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  1. donjetman

    Lake Speed Jr, Oil Additives = Snake oil (video)

  2. donjetman

    Building A 1,000HP Capable 6R80/6L80 Trans

    https://www.dragzine.com/tech-stories/what-goes-into-building-a-1000hp-capable-6r80-transmission/ @NickTransmissions
  3. donjetman

    20-50 oil is Thicker than 75-90 gear oil

    Don't believe it? Watch this: and here's the chart:
  4. donjetman

    Fuel Pump Module????

    07 Yukon Denali w/stock 6.2L L92 w/195k corrosion free miles. No DIC or CEL. It runs great. BUT the fuel gauge is all over the place. And the pump is 17 yrs old. I'm dropping the tank and replacing??? It's my understanding the fuel level sending unit is part of the fuel pump module. Correct me...
  5. donjetman

    GM Tranny & LS Engine Swap Resource-Free eBooks

    https://auto-guild.com/
  6. donjetman

    6L80 video for 1000+ hp

    Richard of Precision Transmission (Amarillo) doing the build
  7. donjetman

    Engine Used Oil Analysis Report & Filter Guts

    Oil & Filter had 5100 miles. OLM = 51% remaining. 07 Denali w/6.2L L92 w/195k miles Use is 70% hwy (18+ mpg) and 30% local/rural (15 mpg) Oil was a mix of the two (see pic). Engine didn't need any makeup. Catch can caught 2 ounces in this 5k mile oil change interval. Filter has some carbon in...
  8. donjetman

    Emptied Catch Can

    It's been 5100 miles & 6 months. Got about 2 ounces again. Did an oil & filter change too. Sent a sample to OAI/Polaris lab for analysis. I'll post results when I get'em.
  9. donjetman

    Code P0463 Fuel Gauge no worky

    07 Yukon Denali w/193k miles Fuel gauge has started acting wonky (again). When half full or less it reads 7/8. I filled up and now it reads empty. No other issues. Probably the original fuel pump/sender module. I guess its time for a tank drop and replace pump sender module with AC Delco MU1639...
  10. donjetman

    P0300, Random misfiring at idle, Counterfeit Spark Plugs?

    07 Yukn Denali 6.2L w/193k miles. 5+ years ago I bought a set of AC Delco #41-962 spark plugs from amazon. 2.5 yrs and 22k miles ago I installed them gapped at .040". Recently, I've been getting a P0300 code and the engine has had a misfire at idle. It runs great otherwise. It doesn't set a CEL...
  11. donjetman

    Coolant Surge or Recovery Tank Hoses?

    07 Yukon Denali. I'm installing a new coolant surge/recovery tank. I need the 2 molded? hoses (part #s) that connect to the coolant surge/recovery tank. The smaller (.47"id) top hose goes to the radiator. The larger (1"id) bottom hose goes the the themostat housing area. I assume they are...
  12. donjetman

    BW4485 (NR3) awd Transfer Case Rebuild?

    07 awd Denali w/193k miles. No leaks but I think the chain is stretched. Has anybody rebuilt their Borg Warner BW4485 (rpo code NR3) awd transfer case? and did it reduce the Clunk? I've watched some videos and the job looks easy enough and parts cost is about $300. TIA
  13. donjetman

    Front End Refresh

    07 Yukon Denali 12/21/23 MILEAGE– 192,400 Started tear down to replace: All 4 control arms w/ball joints, bushings, hardware CV axles Bearinghubs and bolts (3) Innerand outer steering tie rods w/boots Caster& camber adjusting kits Rack& pinion bushings and mount Rotors...
  14. donjetman

    Crankshaft Pulley, Seal, Bolt - Replace

    07 6.2L w/193k miles Bought the tools so I can change the pulleys on the 3 LS powered vehicles we own. I've decided to not use the ARP bolt on The Denali, and I'm waiting for a stock bolt, GM # 12557840, to arrive.
  15. donjetman

    Tired Battery=Wonky Fuel Gauge

    A couple of weeks ago the fuel gauge started acting wonky. After being parked for a while, at next start-up, the gauge would be on empty or full ? Eventually I got a check engine light and code P0462 = Fuel Level Sensor A Circuit Low Input. The battery was 5+ yrs old. I tested its capacity, it...
  16. donjetman

    Circle D Specialties Acquires Reid Racing

    https://www.epartrade.com/industry-news/circle-d-specialties-acquires-reid-racing-inc-de67565f
  17. donjetman

    Transmission Codes P0842, P0872, P0877**UPDATE**

    07 Denali w/6L80 tranny and has 191k miles, is shifting okay to me, but I borrowed a MAC Tools code reader and found codes for the tranny. So I think its time to replace the TEHCM pressure switches with seals & membranes, Sonnax kit # 124740-70K and Sonnax tool kit # 124740-TL70. @NickTransmissions
  18. donjetman

    P0171 & Check Engine Light, No Misses or issues

    2007 Yukon Denali 6.2L L92 w/192k miles. Past couple of weeks I keep getting the check engine light and code P0171-Fuel System Lean Bank 1. No Mis-fires. Vehicle runs great, getting good mpg as usual, no other issues. so I ran a can of SeaFoam, no change. 18 mths and 18k miles ago installed 4...
  19. donjetman

    BluePrint Engines 549-HP 6.2L Crate Engine

    BluePrint Engines 549-Horsepower 376-Cube Crate Engine
  20. donjetman

    My Aug of 23 Blackstone used engine oil analysis report

    This UOA report is about 0w20 synthetic "performance" motor oil that Superior Lubricants of Hebron, IN sales & distributes via HPLoil.com, and/or 219-996-3460. It's not their "race oil". The vehicle is our 07 GMC Yukon Denali w/all aluminum 6.2L L92 with 190k miles. We've owned it for 5 yrs. It...
  21. donjetman

    VVT how it works & Limiter install

    For folks that may want to limit a little or a lot their VVT movement:
  22. donjetman

    For You E85 Lovers

    I know what it does to the oil of a drag race engine if not changed often. Here's what it does for the short trippers:
  23. donjetman

    I was Wrong - PCV and Fresh Air

    The PVC system does take in filtered fresh air. On modern fuel injected engines the source is from downstream of the MAP sensor. On a healthy engine there isn't much blowby volume, so a fresh air source is included in the PVC system to help increase air flow volume to carry away harmful vapors...
  24. donjetman

    New Hybrid LS3/L92/LS7 Rectangle Port Head

    https://www.motortrend.com/how-to/enginequest-hybrid-ls7-cylinder-head-preview/?sm_id=organic%3Asm_id%3Afb%3ASC%3Atrueanthem&fbclid=IwAR16nxl2E7KHVWpITBSjEQ1LHG5KfvUWWaI4fV7GaoFTE1vXBKGA2P2plqI
  25. donjetman

    Nitromethane Your Stock TYE-Big Power Gain

    Cleetus McFarland being Cleetus :)

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