ECM completely failed during drive no previous warnings
2019 GMC Sierra engine problems
moderate 217 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
217
Recalls
0
Avg fix
$3,100
2crashes
What stands out
Of the 20 model years of GMC Sierra we track for engine problems, this one carries the most owner complaints on file — 217.
Engine accounts for 36% of every owner complaint on file for this vehicle — the dominant problem area across 12 categories tracked.
The failure pattern owners describe
2019 GMC Sierra owners describe sudden, severe engine failures with minimal or zero warning. The most common complaint involves lifter collapse and camshaft damage in the 5.3L and 6.2L engines, typically appearing between 46,000 and 126,000 miles. Owners report the engine developing a ticking or knocking sound, flashing a check engine light (usually P0300 or P0308 codes), and losing power—sometimes while driving 60–75 mph on highways with children aboard. After inspection, dealers find metal shavings in the oil, seized lifters, and scarred camshafts. A second failure mode involves sudden timing chain breakage or crankshaft bearing seizure, rendering the engine unturnable and requiring complete replacement.
Oil cooler line failures are a third widespread issue: crimp joints separate, oil drains rapidly, and engines overheat or seize. This occurs across temperatures but is common in cold snaps. A separate problem involves piston ring fracture and cylinder wall scoring at lower mileage.
Most owners are outside factory warranty (5-year/60,000 miles) when failure occurs. Dealers confirm these are known issues but claim 2019 model years fall outside current recalls (which cover 2021+ models). GM has offered partial assistance (15–50%) in rare cases or referred owners to NHTSA. Engine replacement costs range $8,600–$19,000 out of pocket, with 6–8 week lead times due to nationwide parts shortages. Owners express frustration that no warning preceded catastrophic failure on vehicles with regular maintenance records.
Same GMC Sierra engine reports on nearby years: 2017 · 2018 · 2020 · 2021 · 2022
Failure modes owners describe
Lifter and Valve Train Failure
Active Fuel Management (AFM) lifters fail or collapse, often causing secondary damage to camshafts, pushrods, rocker arms, and valve seats. This leads to cylinder misfires, loss of power, and complete engine failure requiring full engine replacement.
When: Typically 46,000 to 126,000 miles; most common in 75,000–100,000 mile range
Symptoms owners cite: Check engine light and cylinder misfire codes (P0300, P0308, etc.); Ticking, knocking, or clattering noise from engine; Sudden loss of power while driving; Engine shaking or violent vibration; Reduced power mode activation; Metal shavings in oil and oil filter; Lifter stuck or non-moving on compression check
Codes mentioned: P0300 (Random Misfire), P0308 (Cylinder 8 Misfire), P0016 (Crankshaft/Camshaft Position Correlation)
Repairs/costs cited: Complete engine replacement typically required; costs reported range from $8,623 to $19,000 out of pocket; parts including lifters, camshaft, pushrods, rocker arms, head gaskets, valve cover gaskets often replaced together; 6–8 week lead time common due to high volume of replacements
Recalls/TSBs owners mention: Many owners mention lack of warranty coverage due to mileage or model-year exclusion from recall; some dealers acknowledge this is a known issue but claim 2019 model year not covered by existing recalls (2021+ included); partial GM assistance reported in a few cases (15–50% coverage); most declined financial assistance
Timing Chain and Crankshaft Bearing Failure
Timing chain breaks or stretches, or crankshaft bearings spin/seize, resulting in complete loss of engine compression and inability to restart. Secondary damage to internal components.
When: 54,000 to 122,000 miles
Symptoms owners cite: Sudden loud rhythmic ticking or knocking from bottom of engine; Complete loss of engine power while driving; Engine will not restart after shutdown; Low oil pressure warning; No prior warning lights in many cases; Engine seizure (will not turn over)
Codes mentioned: P0300 (Random Misfire)
Repairs/costs cited: Complete engine replacement required; costs $10,490–$18,751 out of pocket reported; timing chain diagnosis confirmed in at least one case; spun/failed bearings identified in multiple cases; lead times 6–8 weeks nationwide due to parts backorder
Recalls/TSBs owners mention: Most owners report no manufacturer assistance or recall coverage for 2019 model year; owners directed to NHTSA Hotline; one case mentions PE25-001 investigation but vehicle not covered; minimal or no warranty support
Engine Oil Cooler Line Failure (Crimp Joint Separation)
High-pressure oil cooler lines detach or leak at crimp joints, causing rapid oil loss and engine overheating or seizure. Lines fail under cold weather conditions or normal operation.
When: 5,500 to 82,000 miles; most commonly reported in cold weather or cold snaps
Symptoms owners cite: Low oil pressure warning light; High-flow oil leak from under vehicle; Engine overheating or smoking; Loss of power and forced shut-down warning; White smoke from engine bay; Oil visible on ground beneath vehicle
Repairs/costs cited: Oil cooler line replacement required; parts on national backorder with no aftermarket options; repair costs $919–$15,000+ depending on secondary engine damage incurred; owners must replace oil lines and cooler if oil has contaminated them; 15–30 day wait for GM decision on coverage reported
Recalls/TSBs owners mention: Customer Satisfaction Program N212326940 exists for Alaska and Canada (cold-weather areas) but does not cover owners in continental U.S. (e.g., Pennsylvania, Massachusetts); owners refused reimbursement despite identical part failure; dealers report this is a known high-frequency issue and stock parts; one TSB mentioned but not widely applied
Piston Ring Failure and Cylinder Wall Damage
Piston rings fracture or become stuck, allowing oil intrusion into spark plugs and combustion chambers. Cylinder walls become scratched or scored, reducing compression.
When: 71,799 miles
Symptoms owners cite: Oil intrusion into spark plugs; Blue and white smoke from engine bay; Check engine light and misfire codes; Reduced steering assist and parking brake service messages; Engine jerking abnormally during deceleration; Lack of power during acceleration
Repairs/costs cited: Fractured piston rings and scored cylinder walls identified; owner feared driving and did not pursue repair; likely requires complete engine rebuild or replacement
Recalls/TSBs owners mention: Owner referred to dealership but declined due to safety concerns and cost uncertainty
Water Pump Failure Leading to Engine Seizure
Water pump failure or deterioration contributes to engine overheating and eventual seizure, though diagnosis is often unclear until after engine removal.
When: Engine failure at unspecified mileage; water pump deterioration discovered post-failure
Symptoms owners cite: Engine seized at traffic light; No prior warning or overheat indicator; Vehicle dies while stationary
Repairs/costs cited: Water pump replaced along with new engine; owner questioned why overtemp warning was never triggered; new water cooler also replaced; total cost absorbed by owner
Recalls/TSBs owners mention: Dealership performed repair without clear explanation of root cause; no manufacturer assistance mentioned
Cylinder Loss of Compression and Complete Engine Failure
All cylinders lose compression without audible warning or visible symptoms, resulting in sudden total engine failure during normal driving.
When: Mileage not stated; catastrophic failure during normal operation
Symptoms owners cite: Complete loss of engine compression across all 8 cylinders; No noise, smoke, or warning lights prior to failure; Engine simply shuts off mid-drive; Vehicle unable to restart
Repairs/costs cited: Complete engine failure requiring full replacement; diagnosis only possible after towing and professional teardown
Recalls/TSBs owners mention: No manufacturer response documented in this narrative
Camshaft Scoring and Valve Train Damage
Camshaft develops scoring or damage, often secondary to lifter failure or spun bearings. May occur alongside bent pushrods or failed rocker arms.
When: 16 months of ownership; 80,000–106,000 miles common; as low as 49,000 miles reported
Symptoms owners cite: Engine stalling mid-drive without prior warning; Sudden loss of power and multiple warning lights; Engine noise or rough idle; Check engine light with misfire codes
Codes mentioned: P0300 (Random Misfire)
Repairs/costs cited: Camshaft and all lifters replaced; bent pushrod and crankshaft straightening or replacement sometimes required; $5,650–$8,700+ costs reported; bent crankshaft confirmed in at least two cases; repairs done at dealership or independent shop
Recalls/TSBs owners mention: Some dealerships acknowledge this as a known issue but cite warranty expiration or model-year exclusion from recall; minimal or no manufacturer assistance
Excessive Oil Consumption and Related Engine Damage
Engine consumes oil at abnormal rates, initially managed by shortening oil change intervals. Later found to be an early symptom of internal engine failure (piston damage, ring failure, or bearing wear).
When: Prior to failure at approximately 80,000 miles
Symptoms owners cite: Excessive oil consumption requiring frequent top-offs; Sudden loss of power during highway driving; Belt filter and piston damage discovered upon teardown; Camshaft assembly component failure
Repairs/costs cited: Dealer advised shortening oil change intervals from 10,000 to 5,000 miles without investigating underlying cause; subsequent engine failure required belt filter and piston replacement within camshaft assembly
Recalls/TSBs owners mention: Dealer failed to escalate excessive oil consumption as early warning sign; no manufacturer support documented
Synthesized from 217 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 4 most recent
On November 25th, 2025 I had my wife, kids and baby grandson in my truck driving approx 50 mph when the trailer brake light appeared on my dash. I thought that was strange since I was not pulling a trailer. Shortly after my truck felt like it was going to stall and complete loss of power. I pulled into a turn lane and coasted into a gas station parking lot. I put the truck into park and turned…
While traveling in high-speed traffic, the vehicle experienced a sudden and catastrophic mechanical engine failure without any prior warning lamps, messages, or symptoms. The failure manifest as a loud, rhythmic ticking and knocking noise immediately followed by a sudden loss of propulsion and severe engine shuddering. Safety Risk: The loss of power occurred in active traffic, creating an…
We were driving down a farm to market road at about 50 mph pulling an empty cattle trailer when we had a severe power loss, lots of dash lights and warnings. I noticed white smoke coming from the tail pipe. We limped it back to the house and unhooked the trailer and idled it into the Chevrolet dealership in Portland TX. The dealership just called and they said the #5 cylinder failed, there is…
Had engine trouble with your 2019 GMC Sierra?
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 2019 GMC Sierra?
It's a documented issue but not catastrophic. 217 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 52,029 and 107,105 miles, with the median around 84,000. A quarter of owners report trouble before 52,029; a quarter make it past 107,105. 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/2019/GMC/Sierra.
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.