reduced engine power light

Asked by Jan 11, 2019 at 11:29 PM about the 2002 GMC Yukon XL 1500 SLE

Question type: Maintenance & Repair

my truck has been running rough then the reduced engine power light, traction light, and engine light all came on at the same time. it would not accelerate very much

5 Answers

226,945

Go to your nearest auto parts store and have them read the trouble codes. Post them here and we will try to help!

50

The reduced engine power has been happening to my truck for a long time and no one seems to be able to fix it. It has something to do with fuel. I say that because the only way my truck will turn the alert off and gain power while driving again is if I turn engine off, take gas cap off and put it back on.

5 people found this helpful.

i the same has been been happening to my truck and I've put at least 4000 dollars in replacement parts just trying to fix what can be a dangerous issue. i changed all the wiring and harness i even change the throttle body and and alternator a couple of times I am clueless at this point. please help

30

I was having the same trouble. My truck was losing power wouldn’t go pass 20mph.at this point I done had enough, I’m ready to sell it now, so I figure I do a little more research, I drive a 08 Yukon, I have change the throttle bodies a couple of times, still having the same problem,so come to find out you have another throttle position on your gas pedal.I’m thinking to myself this has got to be the fix, so I unplug it hoping for the best and plug it back it in, and what do you kno problem solved smh, these mechanics are the devil

2 people found this helpful.

Bud5244 man I've never been so happy to read a reply lol I left the damn gas station and getting out into semi heavy traffic and my 08 yukon done that same exact thing so i pulled into the next available parking lot and started to google the readings on the dash and this happened to be the first one well i skimmed through and seen your comment climbed under the dash unplugged that sucker and it went off. Engine light is still on so still got that to decipher

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