I always thought the ls engine used a different fuel pump than the 96-up. According to our "sticky" on the swap it says anything pre 96 would need the walbro pump, so should my pump work since I have a 96 gmc that was a 5.0/auto?
Travis
I always thought the ls engine used a different fuel pump than the 96-up. According to our "sticky" on the swap it says anything pre 96 would need the walbro pump, so should my pump work since I have a 96 gmc that was a 5.0/auto?
Travis
Yes, it'll work fine. I'm running a stock 97 vortec fuel pump and pushing 420 plus rwhp.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
Mine didn't work but the check valve was bad in the tank.
I think the fuel was going through the lines and back into the tank, would not hold good fuel pressure at WOT.
Last edited by knute_gis; 07-25-2008 at 07:13 AM.
1997 GMC RCSB
LS6/T56
thats good news because the fuel pump in it right now is only about 4-5 months old.
on an older (pre 1996) do you need to run a bigger pump?
how big?
not from personal experience but from what I've read and spoke with others about 95-down will need to upgrade there fuel pump. Alot are recommending the walbro 255.
I've always used the Walbro pump for a 87 Buick Grand National in the OBS trucks.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
Originally Posted by RedHeartbeat
The one for the GN plugs in like a factory replacement? or do you have to get a whole new pickup and fittings and everything?
its very similar to the stock pump.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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