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You are in the GMC Safari & Chevy Astro
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GMC Safari, Chevrolet Astro, Van
#982 of 1973 Electrical Problem 1996 GMC Safari
Jul 25, 2005 (9:50 am)
I need some help with a strange problem with my 1996 GMC Safari conversion van (120,000 miles).... Shortly after placing van in "Drive" (especially in the morning) my electric power seems to momentarily go out (if lights are on, they will blink - just once, then everything is fine).... It has done this for some time now, and has not really been a problem, however, lately, a few times it has actually killed the engine....I usually pull over, and starts it right back up... The clock resets to 1:00 and I have to set the time on the clock.....Sometimes the several of the "idiot" lights will blinks while this happens too... It has not become a major problem yet, but, I am wondering if anyone has seen this before? I really like the van and plan to keep it for a long time, however, if it becomes unreliable, I need to replace it... Thanks in advance for your help, this really is a great website.....
#984 of 1973 1995 GMC Safari VIN W Code 83
Jul 25, 2005 (2:08 pm)
I have been chasing codes and repairing the components that would trigger a code.
The only code (other that 12) left is...
Problem: Code 83 - TCC PWN Solenoid Circuit Fault
Rough idle in neutral, almost dies when put into gear. Excessive vibration
There is no terminal F wire present at the ALDL so I couldn't check for voltage there.
I checked the fuse for "Gages" and I see voltage across both terminals with a DMM.
I checked the tan/black wire at the 20 pin connector at the passenger side of the transmission and there was no voltage with the key in the on position. There is supposed to be lettered markings on the male or female end of the plug but I couldn't see any indication of letters molded into either side of the plug. I also cleaned the plug with contact cleaner.
I went to check for 12 volts across the brake switch which is described in a TCC test procedure. The procedure references one of two possible brake switches, an upper switch with a vacuum hose and two wires, or, according to the document, there is a lower switch with four wires. The document is ambiguous as to whether one or both of these systems are present on the van.
As I am poking around trying to find these components, (which I still have to find) I put my hand on a solenoid that actuates a plunger that has a cable attached to the end and two wires attached to the solenoid, which is attached to the steering column. The solenoid gets so hot when the key is "ON" that I could not leave my finger on the solenoid for a half of one second before it burned my finger! It is located on the steering column and actuates when the brake pedal is depressed a small amount.
I am sure that this is a problem because any solenoid that gets that hot has a problem. I do not know the name of this component to get a replacement, so...
Question #1 - What is the name of this component so I can tell the parts store the correct name for them to look it up on their computer database?
Question #2 - What brake connections do I need to check for voltage beyond the one listed above. I initially could not find a typical brake switch which would be a plunger with two wires connected and attached to the brake pedal directly. I can see where the typical mounts for this type of switch would be located, but nothing is in the mount.
Question #3 – Are there other circuits that need to be tested in the TCC circuits.
I have asked this question on other forums, with no responses. I hope that one of the readers of this post can assist me.
#985 of 1973 Re: 94 GMC Safari will not start [stecam78]
Jul 26, 2005 (6:49 pm)
On my 92 had the same problem...........................here's what it was
one of the wires going to the drivers side injector inside the throttle body
was rubbing the throttle body itself and had worn away the sheathing on
that wire and was therefore grounding out and blowing the ECM fuse down
on the fuse block by the drivers brake pedal.
Bet you a buck there's a good chance that's your problem
#986 of 1973 Re: Safari will not always start [steve34]
Jul 28, 2005 (2:26 am)
My problem was a BAD COIL! It was finally found by my mechanic friend and now runs like new.
#989 of 1973 1995 GMC Safari 4.3L 4L60-E VIN W
Jul 31, 2005 (1:50 pm)
Symptom = rough ide in park, terrible idle in gear. Very good engine performance as soon as it builds to about 2K RPM. Oil Pressure at idle is 30, 60 at 2K RPM.
Only Code 12 (of course) and 83 is thrown.
Would the bad TTC PWM Solenoid make the van run rough, or is their no relation between a bad idle and this solenoid??
#990 of 1973 Re: 1995 GMC Safari 4.3L 4L60-E VIN W [jdegenhart]
Jul 31, 2005 (3:26 pm)
Hello! I an new to the forum and I hope you guys can tell me where to get the info I need. I hate to butt in on the conversation but I was not sure where to start.
I have a 1987 astro van and the four bolts in the steering column that hold the tilt u-joint in place have worked loose. I was able to get to two of them but the other two seem to be impossible to reach. Any help with this?
#991 of 1973 Differential Noise??? 94 Astro 130,000mi
Aug 01, 2005 (11:44 am)
For years I've heard a noise from "below" when I make a turn at any speed. I've had several family members listen and I've had a professional mechanic listen. No one can pin point the noise without cracking into something down under. At first, I thought it was only my all terrain Michelin tires "roaring" as a turn was made. However my father thinks that it's something in the rear end. I looked at the differential (without taking it apart) and it was a little low on gear grease, but that problem was quickly solved and the noise is still there.
I tow a boat frequently, but it's well within my load range. I tow an even lighter utility trailer, but again well within my load range for that vehicle.
Possible differential gearing problems to take place? Or do I need to have it checked out NOW?
Otherwise it's been a very solid vehicle with no major problems. FYI