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  1. chengny

    Steering column plastic cover

    I've never been into a non-tilt column so I can't speak with any degree of certainty about them. But, if you have a tilt column - I have done a handful of those - I am almost positive that the top end of the actuating rod doesn't attach to anything. The rod is just "captured" between the switch...
  2. chengny

    Full Tank, No Gas

    Couple of questions that - if we knew the answers to - might help someone assist you with your problem: 1. Why were the tanks renewed, and 2. Did this condition exist before the tanks were changed?
  3. chengny

    New Gauge Wiring

    Just like the engine coolant temperature and oil pressure gauges, the gas gauge requires that three leads be connected to it: 1. A 12 VDC power supply, and 2. A direct path to ground, and 3. A sensing leg - with a variable resistance to ground (that is dependent on the media being monitored)...
  4. chengny

    New Gauge Wiring

    I will try to help, but since I'm not sure I understand what is going on, please bear with me. First some questions on the gas gauge issue: 1. I assume you replaced your old gas gauge because it wasn't working - is that correct? 2. You opened the cluster, pulled the original gauge and snapped...
  5. chengny

    Ac pic requested

    Dwg from the Parts Manual - the mounting components/location appear to be identical to what is shown in FP's photos:
  6. chengny

    Fuel selector valve leak-by

    That style of transfer valve is solenoid operated and is controlled by only a single lead. The dash mounted switch is a rocker type (as opposed to later versions which are of the momentary style). When the switch is toggled from tank to tank, it stays where you left it - until you toggle it...
  7. chengny

    Need Help, ECT 3 Modules, no cure ?

    Read the diagnostic stuff below. You'll see that the most frequent cause to throw a 42 DTC is a short to ground - or an open - in either the 424 or 423 circuits. Ring those leads out for both conditions. The pin locations (at the ECM ends) are traced in red below. The circuits traced in yellow...
  8. chengny

    Dual Tank operation.

    However I think I should replace it with one from an 87 because it was designed for efi. Am I correct? Yes, correct. The switch used with a mechanical fuel pump only needs to be closed long enough for the tank select valve to shift over. Hold it closed for like 2 seconds...and let it go. It's...
  9. chengny

    1983 SILVERADO CRUISE CONTROL ISSUE

    If I'm not mistaken, I believe the controller box holds the memory for the resume accel feature Correct - and bumping the slider to R/A for one second or less will return the system to the last set speed. More than one second will dump the stored memory and accelerate to a new set speed...
  10. chengny

    1983 SILVERADO CRUISE CONTROL ISSUE

    The Cruise Master system, used on all 1980---82 models and 1983 Caballero and El Camino, and the Custom Cruise III system, used on 1983---87 models except 1983 Caballero and El Camino, Quick Checker Test Procedure is below. Keep in mind however that the diagnostic tool will only identify a...
  11. chengny

    1983 SILVERADO CRUISE CONTROL ISSUE

    The problem, as described above, wouldn't appear to be caused by - or related to - loss of vacuum to the servo. The fact is that the system initially seems to operate as designed, but - after a period of time - it suddenly and completely shuts down. The throttle snaps to the fully closed...
  12. chengny

    Rear Brakes Needed

    Yeah, I didn't know if maybe a D60 was available as an option on the 1/2 ton line? The parts manual was of no help - no mention of axle variants. Just CK/RV & 1,2,3 and also the drum diameter/depth. That's kind of why I concluded my response like this: The above information is to the best of...
  13. chengny

    Rear Brakes Needed

    To pull the correct shoes, the parts guy won't need to know what kind of axle you have. As you suggest, providing him with the model year and load rating should be sufficient (the 06 - Suburban - classification isn't a factor). But, depending on where you go, they might ask you for either the...
  14. chengny

    No fuel

    The fact that you are seeing (reduced) voltage at the pump would point to a problem in the power supply circuit - rather than in the control circuit. There are two paths that can supply voltage from the fuse block to the pump (through the OPS or the FPR). The FPR is controlled by the ECM -...
  15. chengny

    Building Gauge Cluster

    I’m just not entirely sure what doesn’t work with the circuit board being disconnected. With the printed circuit unplugged, basically everything - won't work. The components that will be disabled include; backlighting, TS & HB indicators, gas gauge, brake/choke/seat belt warning lights and...
  16. chengny

    Building Gauge Cluster

    I've never done this - or even thought about doing it - so consider the source. From the little I know about aftermarket instrumentation, one thing seems universal - any gauge/meter that you add to your OEM panel will need to be wired independently of the dash's factory wiring. In the case of...
  17. chengny

    1984 K5 Windshield Wiper Switch-Only Works On Lo-Bad Switch?

    Diagnostic for "No HI Speed": For a 1984, I'm pretty sure that your washer pump will be integral with the wiper motor - it wasn't moved to the fluid tank until the 1985 model year. Below is the diagnostic for "Washer Pump Inoperative" - refer to dwg above (8C-23) where necessary. You...
  18. chengny

    Booster pin to master cylinder

    You won't have JB brakes. The braking systems supplied with diesel powered trucks are classed as JD*. In 1983 only two ratings were used, either JD3 or JD5. Determine which rating you have by the size of the rear drums (the size of the front discs were the same for either rating). The drums...
  19. chengny

    HF AC gauges any good?

    I bought this set of gauges a few years ago because I didn't have access to my "good" gauges. Figured they'd be junk. They weren't, and I have used them frequently since then with no problems: I have a JB Platinum series vacuum pump so I can't comment on their vacuum pumps. As a side note...
  20. chengny

    Ignition Lock Cylinder And Matched Door Locks Rear Window Cylinder

    Go to a licensed locksmith. He should be able to obtain the key codes from GM or through an authorized re-seller for a nominal fee. Then - using those codes - he will be able to cut a new set of keys for your existing lock sets. The only problem would be if the original factory locks have been...
  21. chengny

    84 electrical issue.

    From a previous post: Removing lamps/current load from a circuit using a thermal type flasher will not improve performance - if anything, doing that will cause the flash rate to slow down. If enough lamps are removed, eventually the flasher will cease to flash altogether. From a previous...
  22. chengny

    Another fuel leak!

    GM part numbers are 15548991 (feed) and 15548993 (return). But it is really hard to find an OEM set. Call inline tube - they may make them but they don't show your exact application (at least I don't think they do). It is very hard to tell. They make nice tubes, but their website is the worst I...
  23. chengny

    Booster pin to master cylinder

    Yep, I've heard this before - the push rod used with hydroboost applications is about an inch too long to use with vacuum diaphragm boosters. Without knowing the rating of your brake system, I couldn't say with any degree of certainty which rod you require. The list of rods is long - and I...
  24. chengny

    No ignition power

    But my radio doesn’t work, door locks, windows, and it doesn’t even try to turn over. That is because the only electrical circuits that are not ignition switched are the ones that were discussed previously (i.e. head lights, tail/front parking/marker & plate lights, dome and courtesy lights...
  25. chengny

    No ignition power

    Don't go by how they look. Check for power with a meter. The probe should be able push through the black gunk, fit into the gap and make contact with the crimped connection. If not, pierce the red leads with the probe - as close to the block as possible. Electrical wiring generally fails at the...

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