i have a 1994 gmc k1500 with a v6. when i stop at a light for more than a minute the check engine light comes on, it will go off after i start going again. it has new oil, plugs-cap-rotor and wires as well as a new coolant temp. sensor...what gives?

Asked by Aug 20, 2014 at 09:49 PM about the 1994 GMC Sierra 1500 K1500 SL 4WD Standard Cab LB

Question type: Maintenance & Repair

3 Answers

113,835

Have the codes pulled, that should help in guiding you to what is starting to go haywire.

1 people found this helpful.
78,095

Even if the light goes off the codes are still in the computer. HTH. -Jim

113,835

Yep, it stores them in memory, they will stay there for about 10 to 15 cold starts.

1 people found this helpful.

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