Drivers side front to back is 1, 3, 5. Passenger side front to back is 2, 4, 6.
There is no adjustment required, but you can clean it with a carb cleaner.
.043
.43L. 1000ml=1L
4L60/E l
43L of 18-k gold
Yes it will bolt right up to it.
There is one before and one after the catalytic converter.
The EGR valve on your Astrovan is on the backside of the intake manifold just under the throttle body attached by two bolts. After installing a new gasket be sure and torque the BOLTS to 17-18ft lbs or the NUTS (if yours has studs) to 15ft lbs)
The fuel lines around the filter; you will need an adapter.
What year is the gtp, if 95 or newer yes, if gtp is in the 80's then no due to pollution restrictions today, and may have to change the computers from each vehicle. Each computer is set to specs for the engine it controls.
1993 CHEVROLET K1500 PICKUP V6 4.3 (262) Z GAS engine 4207 PLATINUM PART Gap=.035 4449 PLATINUM+4 Do not Gap HR9BP PLATINUM PLUG Gap=.035 4302 PLATINUM2 Do not Gap HR10BC SUPER PLUG Gap=.035 7585 SUPER PART Gap=.035
Use an exhaust made for an LT1 engine the blocks are identical it is the insides that is different. Will bolt right on.