1996 Chevrolet Tahoe • V8 4WD Automatic • 290,000 miles

I bought a 1996 tahoe and have just noticed its been decatted. When driving long distances and a load his put on the engine the check engine light comes on and the car seems sluggish and spluttery. After resetting the light everything is fine again and it runs great untill another load is put on the engine.
July 11, 2011.

Check engine light on

Have the computer scanned for code/s-you have a problem within the engine management system that caused the CEL to turn on-This is your starting point of diagnosis,finding out what's going on.

Jul 12, 2011.