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PCM location

Tiny
JERMAINEHARD
  • MEMBER
  • 2002 CHEVROLET TAHOE
  • 14,655 MILES
Good afternoon can someone please tell me where is is the PCM located. Need to change it but cant find it?
Tuesday, November 29th, 2011 AT 7:58 PM

8 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Hello,

The PCM is located up by the left front frame rail enclosed in a cover. Here are the instructions for the replacement and location in the diagrams below. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Tuesday, November 29th, 2011 AT 9:19 PM
Tiny
JERMAINEHARD
  • MEMBER
  • 5 POSTS
Not getin power to fuelpump I changed the rellay in all the fuses. Was good steal no power to pump
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Tuesday, November 29th, 2011 AT 10:05 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Do you have power at the relay? I would harder there first and check wiring before going expensive.

Roy
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Tuesday, November 29th, 2011 AT 10:06 PM
Tiny
JERMAINEHARD
  • MEMBER
  • 5 POSTS
Yes I have power at the relay I checked the with a test light n I'm not gerontology no spark I changed the crank sensor to
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Tuesday, November 29th, 2011 AT 10:12 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Crank sensor has no effect on the fuel pump, just injectors.

Did you jump the relay to verify the pump works? You jump the power wire to the gray wire. That should power up the pump. If it does, it is a control issue with the pcm. If it does not, then you have a wiring issue.

Roy
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Tuesday, November 29th, 2011 AT 10:17 PM
Tiny
JERMAINEHARD
  • MEMBER
  • 5 POSTS
When I jump the relay to thr pump steal no power but when I jump it from the battie it turns on in I get gas n the rheal but when I crank the truck it turn but no fire or spark
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Tuesday, November 29th, 2011 AT 10:38 PM
Tiny
JERMAINEHARD
  • MEMBER
  • 5 POSTS
So do u think I need to change the pcm
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Tuesday, November 29th, 2011 AT 11:13 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
If you jumped the relay and nothing, then you have a wiring issue.

When you sent 12 volts to the pump, it worked. Where did you run the wire? Battery to where?

Roy
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Wednesday, November 30th, 2011 AT 2:03 AM

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