2012 Chevy Silverado Engines
Complete Guide to 4.8L, 5.3L & 6.2L V8 Specs, Problems & Repair Options
Available Engine Options
| Engine | Displacement | Horsepower | Torque | AFM | Reliability |
|---|---|---|---|---|---|
| 4.3L V6 | 262 ci | 195 hp @ 4600 | 260 lb-ft @ 2800 | No | Good |
| 4.8L V8 (L20) | 293 ci | 302 hp @ 5600 | 305 lb-ft @ 4600 | No | Best |
| 5.3L V8 (LC9/LMG) | 325 ci | 315 hp @ 5200 | 335 lb-ft @ 4400 | Yes | Fair* |
| 6.0L Hybrid V8 | 364 ci | 332 hp (combined) | 367 lb-ft @ 4100 | Yes | Fair* |
| 6.2L V8 (L9H) | 378 ci | 403 hp @ 5700 | 417 lb-ft @ 4300 | Yes | Fair* |
*AFM-equipped engines (5.3L, 6.0L Hybrid, 6.2L) commonly experience oil consumption and lifter issues. The 4.8L is considered most reliable due to lack of AFM.
Important: Active Fuel Management (AFM) Issues
The 5.3L, 6.0L Hybrid, and 6.2L V8 engines use AFM (also called DOD - Displacement on Demand) to deactivate cylinders for fuel economy. This system is the primary cause of oil consumption and lifter failures in 2012 Silverados.
Common AFM Symptoms:
- - Burning 1+ quart of oil per 1,000 miles
- - Ticking/knocking noise from engine
- - Misfires on cylinders 1, 4, 6, or 7
- - Fouled spark plugs
Solutions:
- - AFM delete kit installation
- - Updated valve cover with PCV fix
- - Range AFM disabler device
- - Engine rebuild with non-AFM components
Repair vs. Replace: Get an Accurate Quote
Minor Repairs
Call for Quote
- - Throttle body cleaning
- - TPS replacement
- - Knock sensor repair
- - Water pump replacement
Major Repairs
Call for Quote
- - AFM delete + lifter replacement
- - Camshaft replacement
- - Intake manifold repair
- - Timing chain service
Engine Replacement
Call for Quote
- - Remanufactured engine
- - Installation labor
- - Fluids and gaskets
- - 2-3 year warranty included
Call (707) 584-7727 for an accurate quote based on your specific situation.
Chevrolet Silverado 1500 2012
Complete Transmission Repair Guide
Expert insights on common transmission problems, repair costs, and maintenance for your Chevrolet Silverado 1500. Trusted by Sonoma County drivers since 1978.
Common Chevrolet Silverado 1500 Transmission Problems
Based on our 45+ years of experience, these are the most common transmission issues we see with this vehicle model.
5.3L V8 Excessive Oil Consumption (AFM Related)
The 2012 Silverado 5.3L V8 with Active Fuel Management (AFM/DOD) is notorious for excessive oil consumption. GM Technical Service Bulletin PIP5075 addresses this issue but rarely solves it completely. The AFM system deactivates cylinders for fuel economy, but the valve lifters and piston rings in AFM-affected cylinders wear prematurely due to the constant cycling. Many 2012 owners report consuming 1+ quart per 1,000 miles. The only permanent solutions are AFM delete kit installation, updated valve cover with improved PCV, or complete engine rebuild with non-AFM components.
Common Symptoms
- •Burning 1-2 quarts of oil between changes
- •Blue smoke from exhaust on startup
- •Low oil level warnings between changes
- •Fouled spark plugs (especially cylinders 1, 4, 6, 7)
- •Oil consumption increases progressively over time
- •No visible external oil leaks
5.3L V8 AFM Lifter Failure & Camshaft Damage
The hydraulic lifters on AFM cylinders in the 2012 5.3L commonly collapse or fail due to constant cycling of the AFM system. This is one of the most expensive repairs for this model year. If left unchecked, failed lifters will damage camshaft lobes, turning a $2,500 repair into a $6,000-7,000 repair. The 2012 model year is particularly susceptible because it uses the pre-update lifter design. Repair requires replacing all 16 lifters, and most shops recommend camshaft replacement and AFM delete at the same time.
Common Symptoms
- •Ticking or knocking noise from engine
- •Misfires on AFM cylinders (cylinders 1, 4, 6, 7)
- •Check engine light with P0300 random misfire code
- •Rough idle that smoothes out at higher RPM
- •Reduced power and poor fuel economy
- •StabiliTrak/Traction Control warning lights
- •Metal debris found in oil during changes
Immediate attention required! This issue can lead to complete transmission failure if not addressed.
Reduced Engine Power Mode (Throttle Body/TPS)
The 2012 Silverado is particularly prone to Reduced Engine Power warnings. This condition is caused by the electronic throttle body, throttle position sensors (dual TPS design), or wiring harness issues. The TAC (Throttle Actuator Control) system monitors for faults and limits power to protect the engine. Common causes include carbon buildup on the throttle plate, failed TPS sensors, corroded connectors, or chafed wiring. Regular throttle body cleaning every 30,000 miles helps prevent issues. See our complete guide at /blog/reduced-engine-power-chevy-silverado-complete-guide
Common Symptoms
- •"Reduced Engine Power" warning on dash
- •Engine enters limp mode with limited power
- •Erratic or hunting idle speed
- •Stalling at stops or when slowing down
- •P0120, P0122, P2135 trouble codes
- •Poor throttle response or delayed acceleration
- •StabiliTrak and Traction Control disabled
4.8L V8 Knock Sensor Failure
Both the 4.8L and 5.3L engines use knock sensors located under the intake manifold, making replacement labor-intensive ($500-800 in labor alone). The sensors detect engine knock and adjust timing, so failure causes performance issues as the ECM retards timing for safety. The 4.8L is more reliable overall since it lacks AFM, but knock sensor issues are common across all GM V8s of this era. Use only AC Delco sensors for replacement.
Common Symptoms
- •Check engine light with P0325, P0327, or P0332
- •Engine knocking or pinging under load or acceleration
- •Reduced power and sluggish acceleration
- •Poor fuel economy (2-4 mpg decrease)
- •Engine timing retarded excessively by ECM
Intake Manifold Gasket Leak
The composite plastic intake manifold gaskets on 4.8L and 5.3L engines can fail, allowing coolant to leak internally into the engine or combustion chamber. This is a serious issue that can cause head gasket damage, warped heads, or catastrophic engine failure if coolant mixes with oil. Early detection is critical. If you notice any coolant loss without visible external leaks, have the cooling system pressure tested immediately.
Common Symptoms
- •Coolant loss with no visible external leak
- •White smoke from exhaust (coolant burning)
- •Rough idle and random misfires
- •Sweet coolant smell from engine bay
- •Engine overheating
- •Milky residue under oil cap (coolant in oil)
Fuel Pump Failure (In-Tank)
The in-tank electric fuel pump in the 2012 Silverado can fail without warning, potentially leaving you stranded. There was a recall (NHTSA Campaign 14V355000) for transfer pump issues that could cause stalling. Symptoms often start with extended cranking times or power loss during acceleration. The fuel pump module includes the sending unit, so fuel gauge inaccuracy often accompanies pump problems. Replacement requires dropping the fuel tank and typically costs $600-1,200.
Common Symptoms
- •Extended cranking time before starting
- •Engine stalling at idle or while driving
- •Loss of power under load or climbing hills
- •Whining or humming noise from fuel tank area
- •Check engine light with fuel pressure codes
- •Complete no-start condition
Water Pump Failure & Coolant Leaks
Water pump bearing and seal failures are common on 2012 Silverado engines, typically occurring between 80,000-120,000 miles. The first sign is often a small leak from the weep hole at the pump body. If the pump seizes, it can cause severe overheating within minutes, leading to head gasket failure or warped heads. We recommend preventive replacement around 100,000 miles, especially if you notice any seepage.
Common Symptoms
- •Coolant leak from front of engine near timing cover
- •Whining or grinding noise from water pump pulley
- •Engine overheating, especially in stop-and-go traffic
- •Steam from under hood
- •Coolant puddle under vehicle after parking
- •Low coolant warning light
6.2L V8 Similar AFM Problems + Higher Costs
The 2012 Silverado 6.2L V8 shares the same AFM architecture as the 5.3L, meaning it has identical oil consumption and lifter failure issues. The difference is cost - the 6.2L uses more expensive parts and requires premium fuel for optimal performance. While it offers 403 horsepower versus 315 hp in the 5.3L, maintenance and repair costs are 20-30% higher. Consider AFM delete if you plan to keep the truck long-term.
Common Symptoms
- •AFM-related oil consumption (same as 5.3L)
- •Lifter noise and potential failure
- •More expensive replacement parts
- •Premium fuel recommended (higher operating costs)
- •Spark plug access more difficult
Exhaust Manifold Bolt Failure
The exhaust manifold bolts on 2012 Silverado V8 engines are prone to breaking due to heat cycling. This is especially common on the driver side. When bolts break, exhaust gases leak until the manifold expands and seals when warm. The repair involves extracting broken bolts (often requiring helicoils) and installing updated bolts. Catching it early prevents manifold warping.
Common Symptoms
- •Ticking noise from exhaust on cold start
- •Exhaust leak sound that diminishes when warm
- •Check engine light (lean codes P0171, P0174)
- •Exhaust smell in cabin
- •Failed emissions inspection
Not seeing your specific issue? Our ASE-certified technicians can diagnose any transmission problem.
Contact Our ExpertsChevrolet Silverado 1500 Transmission Services Available
Professional transmission repair services tailored to your Chevrolet Silverado 1500. Contact us for a personalized quote based on your vehicle's specific needs.
Our Services Include:
Complete Engine Diagnostics
Comprehensive computer scan with live data analysis, compression test, leak-down test, and visual inspection to accurately identify 2012 Silverado engine problems.
AFM Delete / DOD Disable
Permanent removal or electronic disabling of Active Fuel Management to eliminate oil consumption and lifter failure issues. Includes DOD delete kit with non-AFM lifters, valley cover, and tune.
Lifter and Camshaft Replacement
Complete valve train repair including all 16 lifters, camshaft, pushrods, and related components. We recommend non-AFM components and AFM delete during this repair.
Throttle Body Service & TPS Replacement
Professional throttle body cleaning, TPS diagnosis, and replacement to resolve Reduced Engine Power conditions. Includes TAC system reset.
Intake Manifold Gasket Replacement
Replacement of intake manifold gaskets with updated design to prevent internal coolant leaks. Includes cooling system pressure test.
Cooling System Service
Water pump replacement, thermostat service, coolant flush, and pressure testing to prevent overheating issues.
Fuel Pump Replacement
In-tank fuel pump and sending unit replacement. Includes fuel system pressure test and filter service.
Knock Sensor Replacement
Replacement of knock sensors located under intake manifold. Includes proper torque and connector inspection.
Engine Rebuild with AFM Delete
Complete engine overhaul with updated non-AFM components, new pistons, rings, and bearings. Backed by 2-year/24,000-mile warranty.
Remanufactured Engine Installation
Quality remanufactured 4.8L, 5.3L, or 6.2L engine installation with warranty. Option for non-AFM configuration on 5.3L/6.2L.
Get Your Personalized Quote
Every Chevrolet Silverado 1500 is unique, and repair costs can vary based on:
- ✓Your vehicle's specific condition and mileage
- ✓The extent of repairs needed
- ✓Parts availability and options (OEM vs. aftermarket)
- ✓Any additional services discovered during inspection
Free Diagnostics: We provide comprehensive diagnostic services at no charge to accurately identify your transmission issues before any work begins. You'll receive a detailed written estimate with transparent pricing.
Why Choose Rohnert Park Transmission?
Transparent Pricing
No hidden fees or surprise charges. You approve all work before we begin.
Expert Technicians
ASE-certified specialists with extensive Chevrolet Silverado 1500 experience.
Quality Parts
We use OEM or equivalent quality parts for lasting repairs.
Convenient Service
Quick turnaround times and loaner vehicles available.
Chevrolet Silverado 1500 Transmission Maintenance Schedule
Follow this factory-recommended maintenance schedule to prevent costly transmission repairs and extend the life of your vehicle.
Professional Tip from Rohnert Park Transmission
Regular transmission fluid changes are the single most important maintenance item for preventing costly repairs. We recommend checking your fluid level and condition every 3,000 miles or during regular oil changes.
Schedule Maintenance CheckChevrolet Silverado 1500 Recalls & Technical Service Bulletins
Stay informed about important safety recalls and manufacturer service bulletins for your vehicle.
Active Recalls
Transfer Pump May Cause Engine Stalling
Recall ID: 14V355000
The transfer pump that moves fuel between the two fuel tanks may fail, causing the engine to stall without warning. This is a safety hazard, especially at highway speeds.
Transmission Control Module Software
Recall ID: 14V047000
Software issue in transmission control module could cause unexpected stalling or harsh shifts.
Ignition Lock Actuator
Recall ID: 14V153000
The ignition lock actuator may wear and cause the key to become stuck or the vehicle to not start.
Seat Belt Pretensioner
Recall ID: 15V176000
Front seat belt pretensioner may not function properly in a crash due to insufficient weld penetration.
Technical Service Bulletins (TSBs)
What are TSBs? Technical Service Bulletins are manufacturer advisories about known issues and recommended repair procedures. They are not recalls but provide valuable repair guidance.
AFM Oil Consumption - Valve Cover PCV Update
TSB #PIP5075 • Issued: 2014-03-15
Updated valve cover with improved PCV system to address oil consumption in AFM-equipped 5.3L and 6.2L engines. May reduce but rarely eliminates oil consumption completely.
Related Symptoms:
AFM Lifter Failure Diagnosis
TSB #PIP4701 • Issued: 2013-06-20
Diagnostic procedure for AFM lifter noise and failure. Details inspection criteria and repair procedures for collapsed lifters.
Related Symptoms:
Reduced Engine Power Diagnosis
TSB #TSB 10-06-01-008 • Issued: 2010-08-20
Comprehensive procedure for diagnosing Reduced Engine Power conditions related to throttle body, TPS, and TAC system issues.
Related Symptoms:
Knock Sensor Code Diagnosis
TSB #TSB 09-06-04-030 • Issued: 2009-11-15
Diagnostic procedure for knock sensor codes including connector inspection, proper torque specifications, and harness routing.
Related Symptoms:
Exhaust Manifold Bolt Breakage
TSB #TSB 12-06-01-002 • Issued: 2012-04-10
Procedure for repairing broken exhaust manifold bolts. Includes recommended updated bolt part numbers.
Related Symptoms:
Water Pump Weep Hole Leak
TSB #TSB 11-06-01-003 • Issued: 2011-05-10
Water pump bearing wear causes coolant leak from weep hole. Replacement recommended if leak detected.
Related Symptoms:
Need Help with a Recall or TSB?
Our certified technicians are familiar with all Chevrolet Silverado 1500 recalls and service bulletins. We can perform recall repairs and TSB-related services quickly and professionally.
Related Vehicle Repair Guides
2000 Silverado Engine Guide (No AFM)
Classic 2000 Silverado engines without AFM problems - 4.3L V6, 4.8L & 5.3L V8. More reliable long-term option.
View Guide →2003 Silverado Engine Guide
Complete 2003 Silverado engine guide - 4.3L V6, 4.8L, 5.3L Vortec & 6.0L V8. Pre-AFM era with different issues.
View Guide →2011 Silverado Engine Guide
Similar engine options and problems for the 2011 model year Silverado.
View Guide →Silverado Transmission Repair Guide (2014-2024)
Complete guide to Silverado transmission issues including 8-speed shudder problems.
View Guide →Reduced Engine Power Silverado Guide
Complete troubleshooting guide for the Reduced Engine Power warning on all Silverado models.
View Guide →Chevy Silverado Engine Problems Guide
Comprehensive guide covering engine problems across all Silverado generations 1999-2025.
View Guide →Chevrolet Repair Services
All Chevrolet repair and maintenance services available at Rohnert Park Transmission.
View Guide →Ford F-150 Repair Guide
Compare with Ford's competing full-size truck and its common issues.
View Guide →Frequently Asked Questions
What engines came in the 2012 Chevy Silverado 1500?
The 2012 Silverado 1500 offered five engine options: 4.3L V6 (195 hp, 260 lb-ft), 4.8L V8 (302 hp, 305 lb-ft), 5.3L V8 (315 hp, 335 lb-ft), 6.2L V8 (403 hp, 417 lb-ft), and a 6.0L Hybrid V8 (332 hp, 367 lb-ft). The 5.3L was the most popular choice. The 5.3L, 6.0L hybrid, and 6.2L came with Active Fuel Management (AFM), while the 4.3L and 4.8L did not.
Which 2012 Silverado engine is most reliable?
The 4.8L V8 is considered the most reliable 2012 Silverado engine because it does NOT have Active Fuel Management (AFM). Without AFM, it avoids the oil consumption and lifter failure issues that commonly affect the 5.3L and 6.2L engines. The 4.8L can easily exceed 300,000 miles with proper maintenance. If you need more power, the 5.3L with an AFM delete is the next best option.
Why does my 2012 Silverado 5.3L burn so much oil?
The 2012 5.3L V8 burns oil primarily due to Active Fuel Management (AFM). The AFM system deactivates 4 cylinders during light loads, causing uneven wear on the valve lifters and piston rings in those cylinders. This allows oil to enter the combustion chamber. GM acknowledged this issue with TSB PIP5075 for an updated PCV valve cover, but it rarely solves the problem completely. Permanent solutions include AFM delete ($1,500-2,500) or engine rebuild with non-AFM components ($4,000-6,000).
How much does it cost to replace a 2012 Silverado engine?
A remanufactured engine for a 2012 Silverado ranges from $2,500-$5,000 for the engine alone. With installation labor, fluids, and related parts, total cost is typically $4,000-$7,500 depending on engine size (4.8L is less expensive than 6.2L). For 5.3L or 6.2L engines, we recommend specifying a non-AFM configuration to avoid future oil consumption issues. Call (707) 584-7727 for a personalized estimate.
What is the AFM delete and is it worth doing?
AFM (Active Fuel Management) delete permanently disables the cylinder deactivation system. It involves replacing all 16 lifters with standard non-AFM lifters, installing a DOD delete kit (valley cover and plugs), and often includes a tune to disable the AFM programming. Cost is typically $1,500-2,500. It's absolutely worth doing if you're experiencing oil consumption or lifter noise, and highly recommended during any major engine repair on a 5.3L or 6.2L.
What causes "Reduced Engine Power" on a 2012 Silverado?
The Reduced Engine Power warning occurs when the truck's computer detects a fault in the electronic throttle control system. Common causes include: dirty throttle body (most common), failed throttle position sensor (TPS), corroded TAC module connector, chafed wiring harness, or accelerator pedal position sensor failure. The system limits power to protect the engine. Most cases are resolved by throttle body cleaning or TPS replacement. See our complete diagnostic guide at /blog/reduced-engine-power-chevy-silverado-complete-guide
How often should I change oil in my 2012 Silverado?
For 2012 Silverados with the 5.3L or 6.2L (AFM engines), we recommend oil changes every 5,000 miles with full synthetic oil. The GM Oil Life Monitor may indicate longer intervals, but these engines consume oil - CHECK YOUR OIL LEVEL WEEKLY. Running low accelerates engine wear. For the 4.8L without AFM, 7,500-mile intervals with synthetic are acceptable. The 4.3L V6 can follow standard 5,000-7,500 mile intervals.
Is the 2012 Silverado 5.3L or 6.2L engine better?
The 6.2L produces 403 hp vs 315 hp for the 5.3L - an 88 horsepower advantage. However, both have identical AFM-related issues. The 6.2L costs 20-30% more for parts, recommends premium fuel, and has more difficult spark plug access. For most owners, the 5.3L provides adequate power with lower operating costs. Choose the 6.2L only if you regularly tow heavy loads or specifically need maximum power and accept the higher costs.
How many miles can I expect from a 2012 Silverado engine?
The 4.8L can reliably exceed 300,000 miles with proper maintenance. The 5.3L and 6.2L typically last 150,000-250,000 miles, with AFM-related issues often appearing between 80,000-150,000 miles. Many owners extend engine life significantly by performing AFM delete - trucks with disabled AFM routinely see 250,000+ miles. Regular maintenance, prompt attention to problems, and frequent oil checks are key to longevity.
Should I repair or replace my 2012 Silverado engine?
This depends on the specific problem and your truck's overall condition. Single issues like throttle body, water pump, or knock sensors are definitely worth repairing ($300-1,200). For lifter failure without cam damage, repair with AFM delete ($2,500-4,000) makes sense. If there's cam damage, extensive oil consumption, or multiple problems, compare repair to a remanufactured engine ($4,000-7,500). We provide honest assessments to help you decide - call (707) 584-7727.
Are there any recalls on 2012 Silverado engines?
Yes, the 2012 Silverado has several recalls including the transfer fuel pump (14V355000) which could cause stalling, and ignition lock actuator issues (14V153000). Check your VIN at nhtsa.gov/recalls to see if your truck has any outstanding recalls. All recall repairs are performed free of charge at any Chevrolet dealer. We can also verify recall status during any service visit.
What is the towing capacity of a 2012 Silverado?
The 2012 Silverado 1500 can tow up to 10,700 pounds when properly equipped with the Max Trailering Package and 6.2L engine. With the 5.3L, maximum towing is approximately 10,400 pounds. The 4.8L is rated for around 9,600 pounds, and the base 4.3L V6 is rated for approximately 5,500 pounds. Actual towing capacity depends on cab style, bed length, rear axle ratio, and options installed.
Have more questions about your Chevrolet Silverado 1500?
Talk to Our ExpertsTrusted Chevrolet Silverado 1500 Transmission Repair in Sonoma County
For over 45 years, Rohnert Park Transmission has been the go-to shop for Chevrolet owners throughout Sonoma County. Our ASE-certified technicians specialize in Silverado 1500 transmission repair and maintenance.
Why Choose Rohnert Park Transmission?
- ✓Factory-trained technicians specializing in Chevrolet transmissions
- ✓State-of-the-art diagnostic equipment for accurate problem identification
- ✓Transparent pricing with free estimates and no hidden fees
- ✓Same-day service for most transmission repairs
- ✓Convenient location serving Rohnert Park, Santa Rosa, and Petaluma
2012 Silverado Engine Repair in Rohnert Park
At Rohnert Park Transmission & Auto Repair, we've been working on Chevrolet Silverados for over 27 years. The 2012 model year is one we know inside and out. Whether you're dealing with the notorious 5.3L oil consumption issue, a failed lifter causing engine noise, or the frustrating "Reduced Engine Power" warning, our ASE-certified technicians have the experience and equipment to diagnose and repair it right.
Why Sonoma County Silverado Owners Choose Us:
- ✓AFM Specialists: We perform more AFM delete procedures than any shop in the area
- ✓Honest Diagnosis: We'll tell you if repair makes sense or if replacement is the better option
- ✓Quality Parts: We use OEM and premium aftermarket components, never low-quality rebuilds
- ✓Warranty Protection: All major repairs backed by our 2-year/24,000-mile warranty
- ✓Fair Pricing: Competitive rates without dealer markup
Related Silverado Resources:
- 2011 Silverado Engine Guide - Similar engine options for the prior model year
- Reduced Engine Power Complete Guide - Troubleshooting limp mode issues
- All Silverado Engine Problems (1999-2025) - Comprehensive guide across generations
- Silverado Transmission Repair Guide - For 8-speed transmission issues
Don't let engine problems sideline your 2012 Silverado. Call us today for expert diagnosis and repair.