TrailBlazer 2002-2009
2023- The TrailBlazer, originally introduced as an upscale Blazer, was produced from 2002 to 2008 with a powerful I6 engine and with a monster V8 offered in the Trailblazer SS
Platform: GMT 305, 360, & 370.

Service 4WD then reduced engine power

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Old Jan 1, 2018 | 12:12 PM
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Momma F's Avatar
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Default Service 4WD then reduced engine power

Hi, I have a 2002 Trailblazer. It was running along fine, then the "Service 4-wheel drive' light came on. It was not in 4WD, but was in AWD. It drove a little stiffly. Got home, turned it off.The light was off the next day and the truck drove fine for several miles. Later that day, while at a stop light the 'Reduced Engine Power' light came on and I could get moving. The engine stalled, put it in park, started up just fine. Drove a few feet, stalled out in the middle of the road. Got it started, ran fine, no idiot lights. Parked it and started looking for answers. Any ideas?
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Old Jan 2, 2018 | 8:01 AM
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Originally Posted by Momma F
Hi, I have a 2002 Trailblazer. It was running along fine, then the "Service 4-wheel drive' light came on. It was not in 4WD, but was in AWD. It drove a little stiffly. Got home, turned it off.The light was off the next day and the truck drove fine for several miles. Later that day, while at a stop light the 'Reduced Engine Power' light came on and I could get moving. The engine stalled, put it in park, started up just fine. Drove a few feet, stalled out in the middle of the road. Got it started, ran fine, no idiot lights. Parked it and started looking for answers. Any ideas?
Bad ground somewhere..MAYBE. You really need to hook up the OBD II to see if you are showing any codes. What engine and transmission does your T-B have?
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