WHERE IS THE PCM RELAY ON A CHEVY

1990 Chevrolet Truck

Tiny

pblack1948

December, 5, 2011 AT 1:55 PM

Need to know I have a low voltage detect code

FOUND 165 RELATED QUESTIONS

5 Answers

Tiny

Wrenchtech

December, 5, 2011 AT 2:28 PM

GM doesn't use a PCM relay. What is your exact code number?

Tiny

pblack1948

December, 5, 2011 AT 5:01 PM

The code number was 43 however it has dissappeared and the code get now is 12 which means no distributor signal to ECM. Truck runs for a few seconds then stalls. I really need help.

Tiny

Wrenchtech

December, 5, 2011 AT 8:55 PM

Code 43 is an EST code. Is the3 code 12 putting the check engine light on?

Tiny

pblack1948

December, 5, 2011 AT 9:04 PM

No it isn't

Tiny

Wrenchtech

December, 5, 2011 AT 9:53 PM

That code is for internal ECU error, not distributor communication with the distributor so you may need an ECU but you need to test for injector pulse and spark first.

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