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  1. S

    RPM and MPH Gauge Error

    Thanks for clarifying your truck's details and history. Sounds to me like old age and higher mileage got to your speedometer's air core motor. To me your tach is a mystery unless it has also succumbed to the age/mileage. Actually, yeah, I suspect that's exactly what it is considering it has...
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    RPM and MPH Gauge Error

    :-) you'd be bored driving with me! 4L80E shifts around 2000 RPM. Stays around there or under unless I get on the highway where it sits around 2300-2500. Oh, I DO punch it sometimes. How can I not with the 454 and Black Bear PCM? I agree with you on the manual bit, though. My Maxima is a 6-speed...
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    RPM and MPH Gauge Error

    OK, a couple of things. Someone mentioned V6 versus V8. I will add diesel clusters won't work for you, either. Do you KNOW what those three replacement clusters came out of? The speedometer and tach had different ranges sometimes, too. Get as close a match as you can. The tach error really is...
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    RPM and MPH Gauge Error

    On my '97 the tach is accurate, but the air core motor for the speedometer was causing it to read 15-20% high. I tried 3 replacement instrument panels before I got one that only reads 10% high. I discovered the tach air core motor has the same number as the speedometer one, BUT the plastic...
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    More HVAC trouble- Control panel?

    OK, I don't want to tempt fate, BUT here it is. I unplugged the compressor clutch, sprayed some contact cleaner into the female side (harness side) and plugged it back in. Then I unplugged it again and pried the terminals toward the middle of the plug just a bit - less than a mm. That was a...
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    More HVAC trouble- Control panel?

    Thanks. Yes, I will do that (or have it checked by the folks who filled it). However, a bit of new info... I started her up after supper this evening and still no A/C. I opened the hood to check the plug on the back of the compressor. I remembered it doesn't "click" into place like it should...
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    More HVAC trouble- Control panel?

    Hi folks, Well, it looks like my HVAC trouble is not all resolved. I have replaced the compressor, condenser, receiver/dryer, both hoses and all the pressure switches. The system was working great for a couple of months. About a month ago I started noticing a hissing for a couple of seconds...
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    Beefing up a 4l80e

    Excellent! Thank you for that. I don't know why I didn't notice the TC unlocking like that before. Maybe with the tune I am using less gas pedal for my normal driving. Good info, thanks! I don't see hauling more than a flat car trailer with a 3000-4000 lb car on it, maybe a covered one. It will...
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    Beefing up a 4l80e

    So, my 1997 K2500 with the 454, 4L80E and tow package can't safely tow 10,000 lbs without risking the transmission? I wondered if towing in 3rd would be safer, but now I hear the TC locks in 3rd, as well. I don't expect to ever tow more than maybe 8,000 lbs, but I sure would like to know the...
  10. S

    Water leaking from blower motor.

    Yup, it's always that one screw. Hard to believe nobody saw this coming way back in the design stage.
  11. S

    Manual Cargo Light?

    My '97 comes on and off (delayed) with my dome light when the Cargo light switch is on. Pretty sure it will also stay on with the dome light, too, instead of the door switch.
  12. S

    A/C "moan" 1989 K1500. 350 tbi.

    I am getting a similar noise. I have replaced the idler pully, tensioner and pulley, alternator a couple of years ago and compressor just in the past month. It happens even when the A/C is not on. It is intermittent and has been for several years. I notice at idle when just started for a minute...
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    '89 Stepside "Way Cool Jr."

    Hi Erik, Did you look in the box yet? No rear support necessary. It's only about the size of a pound of butter! However, I did get the mounting kit that allows its cradle to fit in the dash and the stereo to just slide in. The harness was a cakewalk, too. Edit: Oh, yeah, I put in a generic...
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    Single-DIN Stereo Recommendation?

    Erik, this is what I put in mine https://www.crutchfield.ca/p_113KMBT328/Kenwood-KMM-BT328U.html . I also got the install kit for $16 that even included the harness adapter. Plug 'n' play, simple and fast install. Great phone sound. I put the mic in the lower right corner of the gauge cluster...
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    No brake lights. Brake light circuit diagram needed.

    Yeah, sorry, mine is a 1997. So, the main brake light wiring doesn't pass through the multi-function switch pre '94/'95? Or, is that a maybe?
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    No brake lights. Brake light circuit diagram needed.

    OK, here is what I learned from experience - actually it was taught to me by an experienced mechanic the first time I started having intermittent brake light failure about 10 years ago or more. The multi-function switch WILL fail on our trucks and a myriad of other GM vehicles. In our case -...
  17. S

    Flowmaster cat back?

    Finished with pictures.
  18. S

    Flowmaster cat back?

    If it ever gets bothersome, well, there's the volume knob on the stereo for that! ;)
  19. S

    Flowmaster cat back?

    Thanks. No towing. YET. The day may come when I'll have to pull a 28' Vee front covered trailer loaded to the gunwales. She's already outfitted for towing. The original owner ordered her for that. He had a 5th wheel RV. The other thing that may happen is I may have to put a plow on her if I'm...
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    Flowmaster cat back?

    Yes, the original stainless pipes are super quality. Like I said, mine are 25 years old and the front half are still almost like new. The tailpipe had a few questionable spots, but would likely have gone a few more years. 0.1" difference is nothing to worry about either way.
  21. S

    Flowmaster cat back?

    OK, I ordered from truckpartsuperstore.ca . Great to deal with. I got the kit and over the past few days prepped everything. Today I cut out the original muffler and tailpipe and installed the Flowmaster. Prep: I cleaned the muffler with mineral spirits and dried it. Then I scuffed the surface...
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    Intermittent Main Brake Lights - High Mount Always OK

    BANG! There it is. Thank you, Stu!
  23. S

    96 Vortec 5.7 Crank but no start… help!!

    Plug it into an OBD2 bluetooth dongle and connect to an app like Torque on your phone to check fault codes FIRST. I don't get why your oil level has not increased no matter what fluid caused the hydrolocks. The only place that could go is the crankcase. Maybe you were down a quart and now it's...
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    Intermittent Main Brake Lights - High Mount Always OK

    You know guys, I have the FSM, but it is not a great copy. However, it does not show the multi-function switch or the high mount brake light. It does show a wire from each Tail/Turn/Brake socket going to the turn signal switch (which IS the multi-function switch). It also doesn't show the actual...
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    96 Vortec 5.7 Crank but no start… help!!

    OP, the white smoke is a giveaway for coolant in the combustion chamber - blown head gasket. However, you said your oil and coolant are OK. Your engine is definitely hydrolocking, but with what fluid? I'll go out on a short limb and say it is gas. Running rich will make black smoke, but running...
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