Does your ignition key have a black chip on it? If so, it has generation one passlock antitheft system. You will need a wiring diagram to find and identify the 2 wires that lead up to the ignition cylinder. Take your key and measure the black chip with an ohm-meter. It is a resistor and there are 15 different values it could be. Once you know the ohms of the resistor, you go to radio shack store and find a resistor with about the same resistance. Cut the two wires under the dash and solder the resister to the wires leading away from the steering column. (not the cut wires leading to the steering column). At this point you have permanently bypassed the passlock key system and it should start.
When the system sees the correct resistance (the key), it allows the starter and fuel system to operate and run.
SOURCE: 1987 Chevy G20 van replace power steering pump
Does your van have the serpentine belt? If so maybe I can help, I replaced the Power steering pump on my 90 G20 a couple of weeks ago. The trick is that you need to pull the pump pulley which is pressed on to access the mounting bolts which attach the pump to the engine. Harbor Freight tools sells a great tool designed for this job for $20.00. Once you have the correct tools, remove the serpentine drive belt. You may also need to remove the fan shroud. the pump shaft looks like it has an allen socket in the center, but this is for use in the manufacturing process, and will not come out. Place the puller tool on the pulley following tthe instruction that come with the tool, and remove the pulley. loosen, but do not remove the nut on the high pressure hose connection. use a pair of **** pliers to cut and remove the crimp clamp on the low pressure hose. If your pump has the remote reservour loosen the clamp on the reservour hose also. Remove the three mounting bolts, place a large pan under the pump to catch drips, and remove the prevously loosened hoses. there will be fluid leaking all over and the pump should come free, There are two types of replacement pump sold. With and without reservour. This reservour is a metal cover that fits over the back of the pump, and should not be confused with the reomte revervour found on some newer models which is next to the battery. This reservour is held in place be two throught the pump bolts which are removed at the back of the pump. If your new pump has a reservour you will probably still need to remove these bolts and put them in the replacement pump as most are shiped without these bolts. If you replacement pump comes without a reservour pull the bolts, the reservour should pull off of the old pump and slide onto the new one. check the o rings and replace the through the pump bolts. Installation is the reverse of removal execpt that 1/2" hose clamps replace the crimp clamps on the low pressure hose, and the puller tool is set up differently to replace the pulley. Finally if you don't flush contaminants out of the system your repair will last maybe a week. www.cardone.com has a great article about power steering flushing, read it before you start Good luck.
SOURCE: Serpentine Belt chevy g20
hardest part is to remember how to rout the belt theres a place u can put a 1/2 inch or 3/8 ratchet on the tensior to make the belt slide offf
SOURCE: Electronic Control Module Installation 1994 G20 Chevy Van
I just had the same problem. If it is a regular van try under the driver seat in a plastic box. If it is a conversion van try in a pannel just behind driver seat on side of van wall behind a pannel that looks like a vent.
SOURCE: 1994 Chevy G20 Van - Van (auto trans) only has high (D) gear
Sound like you're going to need to drop the transmission pan so you can replace the filter along with fresh transmission fluid. I had a problem like that many years ago, this correct the problem... I also know that the throttle positioning sensor will also cause transmission shifting problems. I would start with the filter change then go from there... Good luck.
SOURCE: 95 G20 Chevy van: ABS light stays on, pulls right when braking
You actually have two separate problems. The brake pull to the right is indicating the left side brake is not working properly. You will want to remove the left front wheel, collapse the caliper piston and make sure the caliper is floating freely on its mounts.
With the piston collapsed you should be able to slide the caliper inboard and outboard of the rotor. If not, you will want to remove the attachment pins, clean and lubricate the pins. If they are grooved or worn you will have to replace them.
The second issue of the ABS light is indicating the system has detected an electrical sensing or control problem. Take the vehicle to your local Auto Zone or Advance Auto and ask them to scan the vehicle for trouble codes. They will scan it for you at no charge.
Chances are you will find a wheel speed sensor problem at one of the wheels.
Write the codes down and respond back, we can start diagnosing the problem,
Good luck, let me know.
Regards,
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