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  1. Matt69olds

    Brainstorming about my 81 GMC

    If it has nuts or bolts, or wires, I’ll mess with it. While I can and have done a little bodywork, it’s definitely not my area of expertise. Which means paying someone to do a job that I would t be satisfied with if I attempted it myself! All that fabrication and tweaking no doubt would take...
  2. Matt69olds

    Brainstorming about my 81 GMC

    I was aware of the cowl/hood issues, didn’t know about the hood hinges. I think I’ll do the suburban front end, I prefer that look. My dad always had a beater squarebody. He bought his first when the trucks got old enough to become beaters. Since they were beaters and work trucks, I had lots of...
  3. Matt69olds

    Brainstorming about my 81 GMC

    That’s exactly the info I needed! Thanks!!
  4. Matt69olds

    Carb recommendation 1974 Cheyenne 454CI

    Q-Jet! Either rebuild the factory carb CORRECTLY (including the worn out throttle shaft bores) or get one done by a specialist.
  5. Matt69olds

    Electrical Load Causing Weak Blower Motor?

    Find someone with a clamp on ammeter. With the engine idling at an elevated speed, turn on every electrical accessory, put the clamp on the positive battery cables, and take a reading. If that number exceeds your alternator output, it’s time to upgrade. If you think the problem is in the...
  6. Matt69olds

    Brainstorming about my 81 GMC

    I’m slowly gathering parts for when my 81 GMC goes in for major renovation. I’m hoping life calms down enough that I can actually get started soon. I have always preferred the older model round headlights. After some discussion here, I quickly realized that’s entirely too much hassle to...
  7. Matt69olds

    Transmission swap questions

    Bingo! If it ain’t broke, don’t fix it. While technically the trans is “broke” unless you really plan to beat up on the truck, there is no need to “fix it” with a different trans. As mentioned, there are several different families of the 4l60. The earlier 82-86 aren’t as desirable, the...
  8. Matt69olds

    Trying to sort a rats nest.

    Cruise the vacuum hose goes to the cruise servo. It’s a backup, if you hit the brakes and the cruise doesn’t electrically disengage, the vaccum switches dumps the vacuum and the servo releases the throttle. That connector is where the pink/purple wire plugs in.
  9. Matt69olds

    Trying to sort a rats nest.

    Cruise control lever
  10. Matt69olds

    Any GM 2.2 engine experts in readerland?

    Great big steaming piles of horse excrement!! After a few questions and some research, it appears the big difference is the tone wheel and crank sensors are completely different. There are other design changes, but that’s the big headache. I have little doubt the problem could be overcome, but...
  11. Matt69olds

    Any GM 2.2 engine experts in readerland?

    Correction: the engine, rearend, FACTORY wheels with decent tires is worth the 400 bucks. Especially once I send what’s left to that big scrapyard in the sky. The 97 has some hideous aftermarket chrome wheels on it now. Not sure what brand they are. I’m sure whoever bought them originally was...
  12. Matt69olds

    Any GM 2.2 engine experts in readerland?

    Last year my son bought a 97 S-10 with the rompin stompin 2.2 engine and a 5 speed. A couple weeks ago, the engine started making some VERY bad sounds, it locked up tight on the drive home. Over the weekend, I found what is quite possibly the most rusted out 99 S10, also a 2.2 but with an...
  13. Matt69olds

    Cruise control DBW PSI harness

    What wires/signals does your EFI need to function? Pretty sure there is a cruise diagnostic chart somewhere in the electrical forum.
  14. Matt69olds

    Cruise Control Wiring

    The VSS signal comes off the speedo head, and plugs into the speed buffer. It’s a greenish colored box somewhere near the speedometer housing. There is a connector that comes out of that for the speed sensor signal the the ecm and cruise module. There is an also a yellowish colored module that...
  15. Matt69olds

    How to remove the fuse box from the bulkhead connector

    The 5/16 bolt under the hood holds the engine compartment half of the harness to the dash harness/fuse box. More than likely , you will need a heat gun to soften the sealer/glue that GM used to weatherproof the terminals. The 2 long screw under the dash hold the fuse box/firewall connector to...
  16. Matt69olds

    86 4 speed 4x4 cab

    Some more pics: Well, crap. For some reason this is all that will load. The drivers side is by far the worst. I’m not looking to make a bunch of money off of this, if someone is interested make an offer. I’d really prefer someone gets some use from it. It’s sitting on my trailer, I’ll need...
  17. Matt69olds

    86 4 speed 4x4 cab

    Selling a 86 3/4 4x4 bare cab. It has the typical rot in the rocker and cab corners. Non A/C, 4speed. Central Indiana. $300 or make an offer???
  18. Matt69olds

    No spark to plugs

    Read this: https://www.gmcmi.com/wp-content/uploads/2014/05/HEI-Testing.pdf
  19. Matt69olds

    TPS low voltage at signal wire

    I assume you have verified the throttle is actually opening far enough to get a higher reading? Is there a tps adjustment? Remove the tps, see if you can move the lever enough to get a higher voltage. If 2.3 volts is as high as it goes, I’d say you have a defective tps.
  20. Matt69olds

    1980ish K10 3 lights then 1 light on press

    The black sticky tar is what the factory used to seal the bulkhead connector. Does the left turn signal not work at all? Meaning does the indicator in the dash light up but not flash? What about either front or rear bulb? Turn on the ignition, put the turn signal lever in the left turn...
  21. Matt69olds

    overdrive super servo

    I have never used one, so I have no clue if it’s beneficial. Unless you were really working the truck hard while in overdrive, I don’t see a need.
  22. Matt69olds

    700r4 4x4 no second gear

    If the band broke, you won’t have 4th either. Take a long pry bar, wedge it between the floor and the servo cover. If you can get it to go in more than a1/8, maybe 3/16 inch, either the band is cooked or the band itself is broken. Either way, it’s gotta come out to be replaced.
  23. Matt69olds

    Turbo 350 to overdrive

    The 700 needs no electronics. The converter clutch is cheap and easy to make functional. The TV cable is critical, it HAS to be right.
  24. Matt69olds

    Th400 hard shift into reverse and drive

    What’s the idle speed? Whats engine vacuum at the modulator?
  25. Matt69olds

    Transmission pan gasket replacement

    As mentioned, make sure the pan is flat and clean. The tan smooth gaskets work great if installed correctly. They basically glue themselves to the case. The key is to make sure everything is clean and dry during installation.

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