GMC Sierra owners have reported 13 problems related to check engine light on (under the engine and engine cooling category).
While driving check engine light, service stabilitrac and service traction control on information center, followed by a reduced power notification. This clears and occurs without warning rendering the mv near useless.
See all problems of the 2008 GMC Sierra.
Crank vehicle turn corner , message engine power reduced, check engine light appeared, turn around return 200 feet to home, check all fluids connections turn off ignition, unable to start engine, let sit, unable to start engine, drive wife to work other vehicle, recheck all fluids connections, refill coolant, crank engine, coolant discharge on overflow line on cold engine, kill engine would not start, go to autozone get extra coolant and new gas cap. Return coolant level ok. Install new gas cap, engine hard to crank like vapor lock or no fuel to engine. Crank engine, let run, kill engine. Unable to crank, return to work, return in 3 hours, reinstall old gas cap, check fluid levels, ok. Crank engine let run for 5 minutes, check engine light still on, wait one hour, crank engine back to normal check engine light off, engine run ok, drive short test drive. Unable to operate vehicle safely for 6-8 hour period, unsure if vapor lock, bad fuel, fuel filter, bad plugs, coil on plugs, loose plug wire, etc. Never had any engine problems in the past. Only instrument panel cluster failure, and steering click knock that was fixed by dealer. Research problem on internet, it appears this is a throttle position sensor failure that GMC has identified as a safety problem and made a special extended coverage for 2008 to current year vehicles or ten years or 120000 miles. Fromresearch on computer, it appears tens of thousands of comments regarding this loss of power and engine stop. I am older man and reacted with caution and was near my home. Had I been on a busy street or highway a crash or injury would most certainly occurred with this disabled vehicle the cause. I had never imagined this would happen to me nor had I heard of it from any media source or dealer memos. I am hesitant to drive any distance or on certain high traffic roads due to this problem recurring.
See all problems of the 2005 GMC Sierra.
Tl- the contact owns a 2005 GMC Sierra. The contact stated that while driving at approximately 60 mph, the engine suddenly increased in speed to approximately 10 mph. The contact stated that the display panel read "reduced power mode" and the check engine warning light illuminated. The vehicle was restarted but the failure recurred multiple times. The vehicle was driven to an independent mechanic where it was diagnosed that the throttle body needed to be replaced. The vehicle was repaired however, the failure recurred without warning. The vehicle was then taken to a dealer where the throttle body wire harness, the throttle accelerator control module, the accelerator pedal assembly were repaired. The repair failed to remedy the failure. The failure mileage was approximately 270,000. Djr.
2014 GMC Sierra. Consumer writes in regards to vehicle electrical panel froze while driving. Also, the power steering locked up, the headlights did not work properly and the alarm sometimes sounded after the was removed from the ignition. Also, the engine light illuminated. The vehicle was taken to the dealer twice. However, the problem was still not resolved. There was a hesitation/lurch coming from the transmission, and an issue with the tire pressure monitoring system. The instrument panel malfunctioned on the way back from the dealer. The check engine light, illuminated sporadically. Updated 07/10/14 the consumer stated there was a steering issue, as well. The dealer was unable to replicate the problems. Updated 08/06/14.
See all problems of the 2014 GMC Sierra.
I had my truck's ecm reprogrammed last Friday (1/17) due to recall #14v007, and earlier this evening (1/24) the check engine light came in and the dic showed an "engine power is reduced" message. The engine ran very sluggish and I parked it as gm recommended to do in their recall letter. This is the second time this has happened now. I thought that the new software was supposed to correct that issue?.
Tl- the contact owns a 2002 GMC Sierra. The contact stated that the glow plugs malfunctioned as the check engine warning light illuminated. The vehicle was taken to a dealer for diagnosis where the glow plugs were replaced. The manufacturer was notified but offered no assistance. The VIN was unavailable. The failure and current mileage was 41,700. Kmj.
See all problems of the 2002 GMC Sierra.
The contact owns a 2004 GMC Sierra. The contact stated that while driving his vehicle the check engine light illuminated and the message reduce engine power appeared causing the vehicle to reduce speed. The contact stated that the failure happened several times without warning and it was a safety hazard while driving on the highway. The vehicle was not taken to the dealer. The manufacturer was contacted and stated that they were not able to help until the vehicle was inspected. The vehicle was not repaired. The failure mileage was 48,000 and the current mileage was 55,000. Updated 04/12/lj.
See all problems of the 2004 GMC Sierra.
The engine shuts off after it warms up. This can happen at any time and any speed. After waiting approx. 2 minutes it will start again and run fine for the rest of the day. No check engine lights or diagnostic codes are available. There is a recall for the 2001 models (campaign id # 07v521000). This problem also extends into newer model years. Mine was manufactured in 1/02.
The contact owns a 2005 GMC Sierra. The contact stated that the check engine light illuminated. The dealer stated that the failure was within the evaporation system and that the evaporation vent and filter needed to be changed. The failure mileage was approximately 110,000 and the current mileage was approximately 120,000.
Died on highway, cranked but wouldn't start, ended up being crankshaft position sensor, distributor cap, ignition rotor, crankshaft went out and burnt up the other two. Few days later happened again, died on highway, crank but won't start, had to replace distributor cap, ignition rotor, again with ignition coil. Caused 2 tow charges, now check engine light is on and the catalytic converter has gone out.
See all problems of the 2000 GMC Sierra.
Intermittent surges, loss of power while in motion, transmission, lack of acceleration. At purchase, the check engine light came on three times before leaving the dealership lot. Dealer advised that the dealer installed remote starter or alarm system was interfering with fault sensor and was not a problem. However the lost power while driving, intermittent surges and stall outs at freeway speed/85 mph still existed. On one occasion consumer was almost in an accident when the transmission clanged between gears and there was poor acceleration. Consumer had to shift into 4 wheel drive or manually downshift, or turn the engine off then on again. Dealer replaced pcm module, fuel pressure regulator and gaskets, fuel pump assembly. However problem still exist. Dealership agreed to hold the vehicle for further investigation. Further investigation revealed that the wires from the dealer installed accessories such as the alarm system and remote starter or anti-thief system, and factory wire from pcm/vcm to the transmission be replaced. Dealer replaced all ignition wiring, wiring from the pcm/vcm to the transmission and replaced the control valve body that regulates the cruise control. Consumer has been without vehicle for more than 21 days and will seek a replacement vehicle if wiring repairs does not remedy the problem(s).
While driving engine light comes on, and then vehicle stalls. At times vehicle will not restart. Cause unknown. Please give any further details.
See all problems of the 1998 GMC Sierra.
While driving engine warning light will randomly flash on and off. Dealership cannot locate the problem. 85 kilometers.
|Problem Category||Number of Problems|
|Engine And Engine Cooling problems||
|Gasoline Engine problems||
|Car Stall problems||
|Engine Exhaust System problems||
|Engine Cooling System problems||
|Check Engine Light On problems||
|Manifold/header/muffler/tail Pipe problems||
|Gas Recirculation Valve (egr Valve) problems||
|Diesel Engine problems||