1996 GMC 1500 Pickup Q&A

1996 GMC 1500 Pickup Question: why is my truck have loss of power?

when you give it gas it act like it wants to go and sounds like it has power but wont go over 10mph, I though it was the tranny going out but after putting a new one in it still did the same thing, what could be casing this? -
Answer 1
Automatic or manual? 2 wheel drive or 4WD? -
Related Items:
Truck has a camper shell and sound comes up btwn the cab/box/camper shell. Was making the whine at 55mph from new for several years. For the last 10 months it happens at 55,60,65,70mph; but much lo...