Tl* the contact owns a 2008 Chevrolet silverado. While driving approximately 55 MPH, the contact noticed that the temperature gauge went to zero and the "engine hot ac turned off" warning indicator illuminated. The contact pulled over to the side of the road and then drove home. The contact stated that the failure occurred three other times. The vehicle was taken to an independent mechanic and…
2008 Chevrolet Silverado engine problems
moderate 45 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
45
Recalls
0
Avg fix
$3,100
2injuries
When does it fail?
Of the 45 engine complaints filed for the 2008 Chevrolet Silverado, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 45 engine complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
No new NHTSA engine complaint has been filed on this vehicle in over 10 years — the issue may be aging out of the active population.
The failure pattern owners describe
Buyer takeaway: The 2008 Silverado's 5.3L V8 has a well-documented pattern of premature lifter and camshaft failure tied to the Active Fuel Management system, excessive oil consumption that dealers dismiss as normal, and fractured exhaust manifold bolts—all emerging between 50,000 and 130,000 miles and costing $3,000 to $7,000+ to repair. Stalling, fuel-system faults, and sensor issues compound the reliability picture.
Owners of the 2008 Chevrolet Silverado 1500 with the 5.3L V8 describe a pattern of catastrophic engine failures, most commonly involving the Active Fuel Management (AFM) system lifters. The failure typically starts as a ticking or knocking noise and escalates to complete loss of power, single-cylinder misfire, and engine stalling—sometimes at highway speed, creating safety hazards. Repair estimates for lifter and camshaft replacement run $3,000 to $7,000+, and the issue recurs even after repair. Owners also report abnormal oil consumption (2–4 quarts between changes with no visible leaks), fractured exhaust manifold bolts at 50,000–70,000 miles, and unexpected stalling with warning lights that dealers cannot diagnose or fix. Fuel sending units corrode and fail; one owner found a rusted hole in the original unit. A strong sulfur smell from the catalytic converter triggered nausea in occupants and required replacement, only to fail again within months. Dealers frequently tell owners these issues are normal or warranty-expired, while the manufacturer has issued no recall. Owners cite online forums and acquaintances with identical year models reporting the same defects, suggesting this is a systemic issue rather than isolated failures.
Same Chevrolet Silverado engine reports on nearby years: 2005 · 2006 · 2007 · 2009 · 2010
Failure modes owners describe
AFM lifter and camshaft failure
Active Fuel Management (AFM) system collapse causes lifter failure, often in a single cylinder, leading to camshaft damage, engine misfire, loss of power, severe knocking/ticking, and in many cases complete engine failure requiring rebuild or replacement.
When: 52,000–173,585 miles; owners report failures as early as 52k and recurrence at intervals
Symptoms owners cite: Loud ticking or knocking noise from engine; Single-cylinder misfire (often cylinder 4, 6, or 7); Loss of engine power, rough idle; Engine shaking and vibration; Flashing check engine light; Low oil pressure warning; Inability to restart after initial failure
Codes mentioned: P0304 (cylinder 4 misfire), P0306 (cylinder 6 misfire), Diagnosis confirms collapsed/stuck AFM lifter and cam damage
Repairs/costs cited: Engine rebuild or full replacement cost $3,000–$7,000+. One owner reported Pep Boys charged $400 for failed repair; Rosecrans Automotive estimated $4,500+. Requires engine removal to access lifters. Parts replaced include cam, head set, guides, timing components, coolant, oil, filter.
Recalls/TSBs owners mention: GM has offered a Technical Service Bulletin (TSB) with new oil pin and valve covers for vehicles under mileage thresholds; some owners reported manufacturer offered limited warranty discount rather than full coverage. No recall issued as of complaints.
Excessive oil consumption
Engine consumes 2–4 quarts between oil changes (typically 3,000 miles), or runs completely dry with no external leaks. Owners report degradation of oil pan gasket, rear main seal, valve cover gaskets, and piston rings. One owner found no oil in engine after 3,000 miles.
When: Observed starting shortly after purchase or at 50,000–145,000 miles; progressive throughout ownership
Symptoms owners cite: Rapid oil depletion (2–4 quarts per service interval); Engine running without oil pressure warning or shutdown; Burning smell from engine; No visible oil leaks; Rattle or knocking noise in engine
Repairs/costs cited: Dealers tell owners this is 'allowance' or normal for model; one mechanic attempted piston ring replacement. No successful repair reported by complainants. Oil changes and replacement gaskets/seals were attempted without lasting results.
Recalls/TSBs owners mention: Dealers claim excessive oil consumption is acceptable; one manufacturer directed owner to use only 'top-tier gasoline,' which did not resolve issue. No recall or service program confirmed in narratives.
Exhaust manifold bolt fracture
Bolts holding the exhaust manifold to the engine fracture and break off, causing exhaust leaks into the engine bay and potentially into the cabin. Manifold itself is severely corroded. Multiple owners report this as a defect in bolt material, not normal wear.
When: 50,000–69,493 miles
Symptoms owners cite: Exhaust leak and smell; Engine check light illumination; Exhaust fumes entering cabin (safety hazard); Broken or fractured manifold bolts
Repairs/costs cited: Independent mechanics diagnosed bolt fracture and severe corrosion. Owners state repair cost not specified but emphasize it is expensive and not covered under normal wear. No repairs completed in reported cases.
Recalls/TSBs owners mention: No manufacturer response documented in narratives. Owners requested recall.
Fuel sending unit failure and fuel tank corrosion
Fuel sending unit corrodes, develops hole, or sends incorrect signal to engine control module. One case showed rusted-through top plate with 1" × 1/2" hole; another caused vehicle to stall from false 'no fuel' signal despite having fuel.
When: 80,000–used vehicle with original sending unit
Symptoms owners cite: Gasoline spilling from fuel tank filler neck; Check engine light with evaporative emissions code; Unexpected vehicle stall with full fuel tank; Fuel odor
Codes mentioned: Evaporative emissions code
Repairs/costs cited: Owner replaced original sending unit with Delphi plastic-top unit. Dealer could not replicate issue; owner replaced sending unit out-of-pocket.
Recalls/TSBs owners mention: Dealer inspection at one dealership did not identify issue. No recall or warranty coverage mentioned.
Sudden engine stall and loss of power
Engine loses power or stalls without warning while driving at highway speeds. Vehicle may restart after brief wait or restart cycle. Alternating between reduced power mode and shutdown. Low oil pressure or fuel signal may be reported by the vehicle.
When: 18,000–147,000 miles; occurs intermittently
Symptoms owners cite: Spontaneous stall while driving 55–70 mph; Check engine light and warning indicators (traction, engine power reduced, shutdown signal); Starter may not engage initially; Vehicle restarts after waiting or cycling ignition; Loss of steering and brake assist (power steering/power brakes cut off during stall)
Codes mentioned: Check engine light (codes not always recorded), P0128 (coolant temperature sensor)
Repairs/costs cited: Dealers unable to replicate failure in most cases. One case: oil, oil filter, and injectors replaced; owner reports no lasting fix. One case: coolant thermostat and sensor replaced.
Recalls/TSBs owners mention: Dealer diagnostic inconclusive in multiple cases. One manufacturer opened case number 8-3726232141 and offered discount on repairs but no recall. No successful remedy confirmed.
Sulfur/egg odor and catalytic converter malfunction
Strong sulfuric egg odor expels from air vents shortly after startup or during driving. Owner and passenger experienced nausea and vomiting. Catalytic converter fails twice despite being replaced once. Dealer blamed high oxygen fuel content but issue recurred.
When: First year to year 3 of ownership; recurring within 8 months of replacement
Symptoms owners cite: Pungent sulfuric (rotten egg) smell from vents; Nausea and vomiting in occupants; Catalytic converter failure/degradation; No fault codes initially
Repairs/costs cited: Catalytic converter replaced once; failure recurred within 8 months. Dealer recommended top-tier gasoline only. Original and replacement converter both failed; vehicle described as 'junk' after first replacement.
Recalls/TSBs owners mention: Dealer visited 15 times for identical failure; stated no problem found and no alternative solution available. Manufacturer did not pursue further diagnostics.
Cracked cylinder heads
Both cylinder heads are cracked, affecting compression and engine performance.
When: Failure mileage not specified
Symptoms owners cite: Poor engine performance; Compression loss; Rough running
Repairs/costs cited: No repair information provided in narrative.
Engine no-start and electrical sensor faults
Vehicle unable to start despite no warning lights; separate issue involves coolant temperature sensor throwing repeated P0128 code despite replacement with genuine GM sensor; fans run continuously on high; engine loses power at random.
When: 210,000 miles (no-start); recurring failures with sensor replacement
Symptoms owners cite: No-start condition with no warning lights; Fans run on high regardless of engine temperature; Loss of engine power at random; Check engine light (P0128)
Codes mentioned: P0128 (coolant temperature sensor)
Repairs/costs cited: Coolant temperature sensor replaced with new GM part; code and symptoms recurred immediately. No-start case not diagnosed or repaired.
Synthesized from 45 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Had engine trouble with your 2008 Chevrolet Silverado?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2008 Chevrolet Silverado?
It's a documented issue but not catastrophic. 45 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Across the 38 complaints that reported odometer mileage, most engine failures cluster between 63,099 and 145,000 miles, with the median around 111,000. A quarter of owners report trouble before 63,099; a quarter make it past 145,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2008/Chevrolet/Silverado.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.