Where's the torque

Asked by Apr 04, 2017 at 04:35 PM about the 1999 GMC Sierra 1500 SL Standard Cab SB

Question type: Maintenance & Repair

I recently changed my fuel pump and fuel filter.
Now there is lag from park to drive. The truck does
not want to accelerate. The same thing happen
when I am at a stop sign it takes time to get it up
and going. Please some one help

2 Answers

27,105

you should check the idle and full run fuel pressures...also blow out the lines ..and run some good ( ZMAX ) fuel treatment through it...

Could it be anything else. Like a valve?

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