Four problems related to check engine light on have been reported for the 2008 Chevrolet Tahoe. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Chevrolet Tahoe based on all problems reported for the 2008 Tahoe.
While at a stop light or stop sign, while engine is on, at a complete stop while the vehicle accelerates the gas the vehicle completely conks out. The vehicle cannot catch speed after it comes to a stop. I am stuck in the middle of traffic at the light or at the stop sign. Check engine light is on.
Gas engine run away check engine light illuminated with p0069, p0430 (emissions codes) engine uncontrollably revved to maximum 6000 rpm (max throttle)while in drive gear from autostop resume. . Cruse control not enabled slight uphill grade required engine to be shut off with key same day as first event while in drive gear from autostop resume with cruse control enabled at 25 mph engine uncontrollably revved to maximum 6000 rpm was able regain control of engine rpm by shutting off cruse control . . (something in common with the first time ) slight uphill grade uncontrolled high engine rpm from autostop resume still happening after replacement of the map sensor . . . I see as much as 2,000 to 2500 rpm from autostop resume. . . This is not normal it should be starting at 1200 to 1500 rpm. . Normal engine starts are at 1100 rpm.
I purchased my Tahoe from the dealer brand new and always took it to get serviced at the same dealer. In 2015 I took it in for a check engine light and they said there was a misfire and they replaced the camshaft and machined the heads stating that the valves were leaking. Repairs cost nearly $3000. This year 2018 in March the engine light came on again. The dealer stated that there was a misfire in a cylinder the same cylinder that was mifiring 3 years prior. They said a roller on the rocker disintergrated and repairs would cost close to $6000 this is not due to anything I did the vehicle does even have 100,000 miles on it. No harsh driving or anything like that. I believe this is a manufacturing issue. Not a safety issue but I think it is a manufacturing defect.
I bought my 2008 Chevrolet Tahoe brand new. People laugh at me because I've always dealt with the dealership on everything including all oil changes. Now I'm being told that I have lifter and cam problems. I complained about the engine light being on 5 months prior to be told this. I was informed that the check engine light was on because of the tps sticking. I'm a single mother of 2. I purchased a new vehicle not to have these kind of problems especially since I've always taken my truck to the dealership. I cant afford a new engine, my truck is parked and I have to get rides to work from CO-workers. I cant sleep nor work.