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  1. DN7050

    Replacement Key Fob

    I replaced the fob for my 1998 C2500 with one from "USA Remote" on Amazon. I have also used fobs from "remotesremotes.com" and fobs from both were identical to the OEM units and work very well. These are easy to program.
  2. DN7050

    Starter won’t turn flywheel

    Haven't heard of it on a GMT 400 but some other make flex plates have been known to fracture in a ring so that the outer part with the ring gear (and torque converter) is no longer attached to the inner part attached to the crank. So the TC and ring gear spin but not the engine. Remove the...
  3. DN7050

    Alternator removal - how?

    Most are attached with just the two bolts going in from the front on the bottom of the alternator. However, on some there was apparently also a sheet metal bracket on the back with two bolts on the bottom going into the aluminum mount and a nut on the stud on the back of the alternator (or a...
  4. DN7050

    "Hidden" oil galley plug question

    Thanks. That's helpful. Apparently its a good thing. Will put it back in.
  5. DN7050

    Speedometer calibration

    I tried to get a local shop to calibrate the speedo with a tuner but they apparently didn't know how to do that so consulted with a speedp repair shop (in Tacoma, WA) who said the problem is a bad circuit board that had to be replaced for about $200. I called those guys too just to verify...
  6. DN7050

    "Hidden" oil galley plug question

    Rebuilding a 1998 Vortec 5.7. Removed all the oil galley plugs for cleaning and found that the main oil galley running vertically from the oil pump to the oil pressure sender (and the oil galleys around the cam) had a large steel ball used as a plug between the oil filter send and return...
  7. DN7050

    Speedometer calibration

    I recently purchased a 1998 GMC Sierra 2500 (2WD, HD, long bed, extended cab, 5.7, 4L80E) which happens to be in almost new condition, no rust at all, looks new underneath and clean body too. Anyway the primary issue is the speedo reads about 15 mph high at 60 mph. I suspect the instrument...
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