1) on the 1996 gmc 1/2 ton if your facing the engine which is inlet and which is outlet?
2) On the 03 5.3 engine the only vacuum line is the one coming off the intake manifold to brake booster, correct?
Travis
1) on the 1996 gmc 1/2 ton if your facing the engine which is inlet and which is outlet?
2) On the 03 5.3 engine the only vacuum line is the one coming off the intake manifold to brake booster, correct?
Travis
1996 GMC extended cab, 2003 5.3/auto
There's a vacuum line for the FPR.
The heater hoses are different sizes, no?
Vacuum line to PCV valve on valve cover.
No vacuum line to FPR on returnLESS style fuel rail..cause there is no FPR...did that start in '04??
There should be a sticky of engine differences by year, from flat top pistons to number of vacuum lines.
Last edited by r6z4o6; 09-05-2008 at 05:35 PM.
1991 Silverado ECLB
LM7-T56
The evap sol. also on the top behind the TB.
Also, the passenger side valve cover goes to a hose behind the TB.
If you need an extra vac line (you're probably looking for a vac leak though) you can break off the tap on the pass. side intake, towards the back, just an fyi.
Also, if you had the intake off, you could have a vac leak there as well.
Find a shop with a smoke machine, it pumps smoke through the engine and intake at about 1-5psi, works great for finding small leaks.
good luck,
allen
Nelson Performance
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'94 Chevy Truck: 8.9 et, 408 twins
Originally Posted by r6z4o6
Vacuum line to PCV valve on valve cover.
No vacuum line to FPR on returnLESS style fuel rail..cause there is no FPR...did that start in '04??
There should be a sticky of engine differences by year, from flat top pistons to number of vacuum lines.
A 2003 is not returnless on a truck. Trucks got one fuel line in 2005.
my 04 engine is returnless
Thanks. A 2003 is still not returnless. BTW, 2005's are returnless so there's not much wrong above.
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