Question about 1997 GMC Yukon

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I have a 1997 gmc diesel box truck. Retired USPS vehicle. The last couple days is has struggled in shifting, and today is wouldn't shift up past second gear. The fluid looks like it is full. What should I check next?

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I had an old gmc diesel van,it would not like changing gears, thought maybe tranny trouble, & i changed the fuel filter,problem solved, turns out it wasnt getting enough fuel to change gears.maybe your fuel filter needs to be changed

Posted on Apr 09, 2011

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For the past couple of days, after coming to a complete stop, it seems that my vehicle is a little hesistant to accelerate. Could my transmission be slipping?


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2 Answers

Transmission problem


Sounds like an issue when fluid gets hot, I'd start with a filter/fluid change.

I personally shy away from tranny additives, use only as a last resort to get a vehicle drivable to trade in (on a cash for clunkers program. (((SMILE))). )

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