96 gmc suburban 1500. when i turn the key it tries to start but wont. if i hold the pedal turn the floor and turn the key it starts after 10-15 seconds. once started it will run but when i shut it off it has trouble starting again. i have new fuel pump and gas filter in it.i only run it a weekends in the summer for the beach and when it snows. Other than that it sits.

60

Asked by Nov 08, 2013 at 12:15 PM about the 1996 GMC Suburban C1500

Question type: Maintenance & Repair

8 Answers

okay this schematic shows that you've a fuel pump relay~

2 out of 2 people think this is helpful.

https://www.google.com/search? q=96+gmc+suburban+1500+fuel+pump+relay

2 out of 2 people think this is helpful.

....an undervoltage condition from a BAD ground can cause this relay to fail...you must take the main 1/0 battery cable off of the chassis ground and wire brush the lug and the chassis to allow a full three hundred cold cranking amps thru that and still unwavering 12 volts for the ECM and auxilliary devices such as fuel pump, igniition....headlights windshield wipers etc~~

1 out of 1 people think this is helpful.
60

Judge it could still be a relay even it starts?

2 out of 2 people think this is helpful.

welll it could be "stuck on" where you could not shut your car off~

okay we are talikin' about the fuel pump relay?....bad boy be dead...the ignition relay could have you not be able to shut it off or never come on~ either would be compromised with an undervoltage condition~

60

hey Judge but i think its a Hot cranking problem not Cold cranking. it will start only if i hold the pedal to the floor. if i turn the key and just pump the gas pedal it will just try to start. same thing if i just turn the key it just tries to start.like i said pedal to floor turn key and after like 10 sec it starts.

40

I have the same problem it only starts when it's hot outside and when it's cold it will not start at all can anybody help me?

4 out of 4 people think this is helpful.

Your Answer

Add photo

Related Questions

Suburban

Looking for a Used Suburban in your area?

CarGurus has 177 nationwide Suburban listings starting at $1,495.

ZIP:

Search GMC Suburban Questions

GMC Suburban Experts

#1 LouB
LouB
Reputation 1,290
#2 Larry Thibert
Larry Thibert
Reputation 190
#3 ShadetreeMech
ShadetreeMech
Reputation 160
View All

Related Models For Sale

Used Chevrolet Suburban
463 Great Deals out of 18,771 listings starting at $1,399
Used GMC Yukon
516 Great Deals out of 17,124 listings starting at $1,799
Used Chevrolet Tahoe
775 Great Deals out of 28,448 listings starting at $1,500
Used Ford Expedition
418 Great Deals out of 24,693 listings starting at $1,999
Used GMC Sierra 1500
937 Great Deals out of 62,257 listings starting at $1,395
Used Ford Explorer
935 Great Deals out of 73,729 listings starting at $750
Used Ford F-150
2,693 Great Deals out of 211,512 listings starting at $1,000