Go Back   Truck Forums > Chevrolet/GMC Truck Forums > Chevy Silverado/ GMC Sierra Forum
Sign in using an external account
Register Forgot Password?
Search

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 04-16-2010, 05:15 PM
DeeDog55's Avatar
Beginner
 
Join Date: Jul 2008
Posts: 20
Default PCM B fuse keeps blowing

A friends 03 yukon stopped running the other day. We narrowed in down to the 20amp PCM B fuse. When fuse is replaced the engine starts and the ABS light on dash stays on. We would only let engine run for a few seconds because we dont want to hurt anything else. After turning off engine the fuse would be blown on need replacing. Anyone have this problem? Any help would be great.
This ad is not displayed to registered members.
Register your free account today and become a member on Truckforums!
Reply With Quote
  #2  
Old 04-16-2010, 08:06 PM
Senior Member
 
Join Date: Jun 2008
Location: New Hampshire
Posts: 222
Default

PCM B fuse is power for PCM and fuel pump. Fuel pump is most likely the fault.
Reply With Quote
  #3  
Old 04-22-2010, 07:23 PM
DeeDog55's Avatar
Beginner
 
Join Date: Jul 2008
Posts: 20
Default

I triple checked the fuses and the relays. Before I changed the fuel pump I checked the fuel pressure on old pump. It was fine. It just sounded real loud.
NOW the new fuel pump wont even turn on. It dosnt make a sound. It was a new pump from autozone. I dont undestand how the old pump can work and the 30 minutes later the new one dosnt work. I double check the new wires I installed on new pump. The battery is brand new. The grounds that I could locate were all tight. WTF.
Reply With Quote
  #4  
Old 04-22-2010, 07:36 PM
Mr_Shamrock's Avatar
Chevrolet/GMC, Racing, Recreational Forum Moderator
 
Join Date: Apr 2009
Posts: 2,267
Default

It is very possible that you could have either nicked or pulled a wire loose when you dropped or reinstalled the tank. I have done a couple and although I have been lucky on them I always had that thought in my mind when trying to start it for the first time. It is very close quarters down there. Chevy should have an access panel like a lot of the import SUV's!
__________________
2003 Chevrolet Tahoe 4X4 5.3
2002 Chevrolet 2500HD 4X4 8.1 - BlackBear Tuned

Reply With Quote
  #5  
Old 04-23-2010, 03:39 PM
Beginner
 
Join Date: Jan 2010
Posts: 39
Default

or you could have a defected pump I would use acdelco fuel pumps
Reply With Quote
  #6  
Old 04-25-2010, 03:05 PM
DeeDog55's Avatar
Beginner
 
Join Date: Jul 2008
Posts: 20
Default

Well, after dropping the tank for the fouth time, I returned the "BRAND NEW" pump to autozone. Lucky me to get a defected pump right out of the box. They replaced it and what do you know? The Yukon started right up. No more fuse popping and everything seems back to normal so far. Still have to check how much pressure its putting out but I'll do that tomorrow. Thanks for the pointers.
Reply With Quote
  #7  
Old 12-17-2013, 10:34 AM
Beginner
 
Join Date: Dec 2013
Posts: 1
Default

i have gmc yukon.pcm fuse always blown in few second.what is the possible problem?
Reply With Quote
  #8  
Old 01-03-2014, 03:58 PM
Senior Member
 
Join Date: Jun 2008
Location: New Hampshire
Posts: 222
Default

see above^
Reply With Quote
Old 01-03-2014, 03:58 PM
 
 
 
Reply



Tags
150, avalanche, blowing, blown, chevy, ford, fuel, fuse, pcm, pcmb, pump, ranger, start, toyota, truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Advertising

Featured Sponsors
Vendor Directory

Our Sponsors
Advertising
All times are GMT -5. The time now is 03:20 AM.

Internet Brands, Inc.



SEO by vBSEO ©2010, Crawlability, Inc.