Question about 2001 GMC Sierra 2500HD
Recently on the way back home from an out of town trip the Yukon started to climb a mountain pass and the engine started losing power. I was traveling at 75 mph and it starting dropping speed.
It was as if it was laboring to climb. I pulled over, checked the trans. fluid level and it was good. I waited awhile to let the vehicle cool, restarted and continued my trip home.
The vehicle ran o.k for awhile, maybe 15 minutes, but started losing power again, this time on flat roadway. I pulled over, opend the hood, let it cool again and while I was waiting I noticed a small filter attached to the Air filter compartment and it was orange, the instructions on the filter said that if the color turned orange it was time to change it.
Could this of been the problem? I was now in the city and the vehicle ran o.k at city speeds ( 35 mph ) , but still hesitates to shift up when pulling out from a stop sign or stop light.
I also have to mention that the vehicle has never given me problems on trips so this is puzzling. I have the same problem on long trips. After 4+ hours of pulling a trailor I experience progressive and gradual power loss until the engine is struggling to maintain 50MPH on level ground. Last year, I had to climb two hills one was south on I25, Raton pass New Mexico and I17 Southbound Camp Verde hill, Arizona. Both hills brought my speed down to 20 MPH and the engine was struggling.
Gas was full, no warning lights, acted like it did not have adequate gas going to the engine. Had new gas filter, new air filter, changed out all lubricants, engine - transmission - rear end.
Seems to run ok other times - only does it after many hours of road mileage. First thing in the morning, it will pull the world at 80MPH. Once it loses power, I can pull over for 10 min and it will have power again for 1-3 hours.
I know the camp verde hill of which you speak , last vehicle in the shop with that same scenario , after doing everything possible including a catalyst check , as we could not duplicate the problem , we replaced fuel pump at owners request and next trip he confirmed it was a fix .
Posted on Jan 13, 2009
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Posted on Jan 02, 2017
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