My 1500 Sierra runs strong for 15 mins then the engine starts surging. Wait 4 min and runs fine.took 12 stops to go 15 miles.

Asked by Apr 05, 2017 at 02:57 PM about the 1992 GMC Sierra 1500 C1500 SLE Standard Cab Stepside SB

Question type: Maintenance & Repair

1 Answer

114,935

check to make sure you have no vacuum leaks, check the fuel pressure, these must have no less than 55psi at all times,,,,check it when the engine is cold sense it needs more fuel cold...the fuel pump may be weak.

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