97 GMC suburban k1500 starts very good takes off very good great excelleration. But cruising speeds it coughs . New fuel pump and filter, new computer.. Any ideas garages gave up on it.

Asked by May 14, 2018 at 06:42 PM about the 1997 GMC Suburban K1500 4WD

Question type: Maintenance & Repair

1 Answer

Also forgot new transmission and fly wheel. Drove it from Florida to NH with no problem then the trans went so took it to a transmission place had it replaced. Then the computer died. And fuel pump . Now have this cruising speed problem. Rpms do not change. Just cough and ruff idol in gear but smooth in park.

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