I HAVE 94 GMC IT HAS THE 5.7 INIT

Asked by Oct 18, 2015 at 01:57 PM about the 1994 GMC Sierra 1500

Question type: Maintenance & Repair

ITS HARD TO GET STARTED once I get it started sounds good as I rev it up its good till get to about 3 grand then it starts back fireing then dies and it takes for ever to get started again then its the same thing im puzzled 1 ok now the things ive done to it so far changed the plugs the cap and rotor icm and the pick up coil nothen helped I hooked up my scanner the codes it gave me said EST ESC AND FUEL PUMP RELAY OR CIRCUIT PROBLEM I GOT A  RELAY OUT OF A TRUCK AT A JUNK YARD THAT TRUCK RAN GOOD IM ABOUT TO CHANGE THE SENDING UNIT NOW OH ALMOST FOR GOT THE ESC THATS THE ONE ON THE RIGHT SIDE OF THE THOUTLE BODY WHITH A 4 OR 5 WIRE CLIP WELL MY TRUCK NEVER HAD ONE ! THATS WHATS GOT ME PUZZLED THE MOST . PLEASE HELP

1 Answer

I took a hammer and hit the bottom of the gas tank 4 or 5 times and it came right out if runs great now but im still gonna change the fuel pump soon even thoe I didn't get any help on here I thought all of this may help someone else out somewhere down the road .

Your Answer

Add photo

Related Questions

Search GMC Sierra 1500 Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

GMC Sierra 1500 Experts

#1 dragonflyoffshore
dragonflyoffshore
Reputation 4,630
#2 John Saffrahn
John Saffrahn
Reputation 3,240
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 2,910
View All

Related Models For Sale

Used Ford F-150
3,014 Great Deals out of 207,752 listings starting at $1,000
Used Dodge Ram 1500
499 Great Deals out of 13,070 listings starting at $1,495
Used Toyota Tacoma
704 Great Deals out of 31,954 listings starting at $2,750
Used GMC Yukon
557 Great Deals out of 17,134 listings starting at $1,875
Used Chevrolet Tahoe
816 Great Deals out of 27,814 listings starting at $1,700
Used Chevrolet Camaro
400 Great Deals out of 40,630 listings starting at $3,500
Used GMC Sierra 2500
198 listings starting at $4,999

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
22 Great Deals out of 32,776 listings starting at $23,800
2016 GMC Sierra 1500 For Sale
71 Great Deals out of 4,606 listings starting at $18,710
2015 GMC Sierra 1500 For Sale
145 Great Deals out of 4,266 listings starting at $15,888
2014 GMC Sierra 1500 For Sale
156 Great Deals out of 4,266 listings starting at $8,988
2013 GMC Sierra 1500 For Sale
115 Great Deals out of 2,454 listings starting at $9,950