1987 gmc pickup

darrellleece
Joined: 4/12/2008
Location: gibsonton, FL
Posts: 1

	1987 gmc pickup Posted: Sat Apr 12, 2008 11:09:19 AM
	truck has two fuel tanks, left and right. will not change tanks on the fly. i have to stop truck and flip tank switch and turn ignition switch on and off several times until i see fuel gauge flip on to other side and then and only then will truck start. i have spent $1500.00 + replacing tank pumps, fuel switchover valve,dash board switch,fuel relays,ignition switch,wiring,etc,etc. fuel pumps also seem to have trouble picking up fuel when tanks are low i.e.1/8 full.truck exhibits the same symptoms no matter what tank it is on, left or right, please help me out before i go crazy,lol813-340-4391

jatfam
Joined: 7/14/2008
Location: rutland, SD
Posts: 1

	RE:1987 gmc pickup Posted: Mon Jul 14, 2008 5:32:12 PM
	On my 1986 you had to hold the button for about 10 seconds If you have the engine off and push and hold the button you can hear it switch. Mike