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  1. mrrsm

    4.2 Sluggish Acceleration and Odd Cold Startup

    Before you perform the task of examining any Back Pressure issues... and because the Prior Owner had previously 'manhandled' the CAT-Back Hardware so badly, after the Engine and Drive Train have Cooled Down, take a moment to apply a "Dead Blow Hammer" to the center underside of the Stainless...
  2. mrrsm

    Keeping "A Watch" ... On Time...

    Just when you think that a "Story Worth Watching" just cannot get any Better... Oh Man... :>) So I wake up at in the Wee Hours of The Morning (Having to WEE ...and having to UN-FUBAR a Very Bad Feeling on my Left Wrist because of my Retro-Timex... Literally .."Pulling My HAIR Out..."). So...
  3. mrrsm

    Amazon Product A "Sound" Diagnostic Investment...

    We’ve all “listened” to various Sources and Methods (... Mostly Automotive Fables) surrounding the use of 'A “SOUND” Approach' while trying to Diagnose Aggravating and often Mysterious Automotive Engine and Body Noises. The idea of course has always been to discover the Best Means to Pin-Point...
  4. mrrsm

    Tool Talk

    That's what I was thinking, too... I just did NOT want to spend $210.00 for the FULL PPECT3000 Kit which is well described in THIS Video. The VOP (Video Original Poster) displays the cool aspects of those "Cool Green Plugs" at around 14:20 along in this Video and provides an excellent...
  5. mrrsm

    NEED HELP No trailer brakes with factory integrated brake controller.

    Just In Case.... If THIS Trailer Brake System Relay is FUBAR... and is present and Mounted under your Spare Tire as per this VOP (Video Original Poster) ...Have a look-see at THIS Video: And a Broad base Diagnostic that settles in around the Trailer Brake Control Module on a Full Size Truck...
  6. mrrsm

    Tool Talk

    Okay... This is to Finalize everything in Post #754: In order to 'complete the set' for this Power Probe ECT-3000 Thread... I bounced over to Amazon and found this Cool Kit of "Three Hulk Green" Power Probe Automotive Tail Light Socket Adapters. So WHY is this Kit so very important? Well…...
  7. mrrsm

    4.2 Sluggish Acceleration and Odd Cold Startup

    Welcome to GMT Nation... Give this "Once Over The World" View of a "Sluggish on Acceleration" Information and Video Primer for the Tralblazer 4.2L Engine a "Look-See". And in addition to what Chris mentioned above... Investigate an Inoperative or STUCK SAIS Solenoid located on the Center...
  8. mrrsm

    Keeping "A Watch" ... On Time...

    Even though I am Head Over Heels in LOVE with all of my TAG Heuer Watches.... I stumbled across THIS Horological Oddity that WILL Impress and Interest MOST of us engaged with using Stainless Steel in Time Pieces married to Technology that was just emerging out of "Silicon Valley" back in 1987...
  9. mrrsm

    Amazon Product "Tesa HI-TEMP Tape" 5 Rolls under $25.00

    What IS it? ...and Why Use Tesa Tape vs. Regular Electrician’s Tape? (A) Use the "Fuzzy" Flavor for Interior Wraps needing some flexibility. (B) Use the "Shiny" Flavor under the Hood or on Trailers for Hi Temp & Strength. A Field Test on a Battery Ground Cable… Where Can I Get IT...
  10. mrrsm

    4.2 problem

    Check out Post #6 in THIS Thread for the PCM (ECM) Pin-Outs and Class 2 Network Diagram, too: https://gmtnation.com/forums/threads/05-tb-with-no-switched-power-to-radio.20094/
  11. mrrsm

    Tool Talk

    Dammit... I know !!! ... I should have covered THIS Issue back in Post #753 about "Lighted Circuit Tester's"... But until I actually received these last night... I would NOT have been able to clarify: THE MOST SIGNIFICANT ASPECTS OF THEM ALL... "Can you ACTUALLY SEE The Light inside of the...
  12. mrrsm

    "Muscle... Guns...And Trailblazers... LOTS Of Trailblazers..."

    This Hombre is One Intense Dude...Man... I Like This Guy... And Why Would THAT Be? Because HE... Is One Of US... (1) Check out ALL of his Well Made Videos about ALL of his Trailblazers.... "LOTS of Trailblazers..." Check out his Trials & Tribulations while he tries doing more things with them...
  13. mrrsm

    4.2 misfiring after overheating

    Welcome to GMT Nation... Caveat Emptor... Paraphrasing from The Bible: "It is easier for a Camel to Pass Through the Eye of a Needle... Than it is for a Superb Mechanic to Replace the Engine Head on a GM-GMC 4.2L LL8 Engine... While the Motor is STILL Mounted Inside of the SUV..." I'm NOT...
  14. mrrsm

    Oil filter autopsy after MMO

    This is a Controversial Topic... and perhaps this is so because So Few of US have ever completely Torn Down Any Used GM LL8 Motors and actually completely cleaned this Crap off of EVERY Single Engine Surface... right down to Bare, Shiny Metal . What also compounds this 'General Lack of...
  15. mrrsm

    NEED HELP No trailer brakes with factory integrated brake controller.

    Try Pulling BOTH Fuses mentioned in that Image above and sort of "Gently Exercise" the Blade Contacts. Then confirm continuity (KOEO) on All Four Fuse Pin Points with a Lighted Probe. One Last Thought... If those Two Wire Contacts are identical... for B+ Power... Try Reversing them at the Fuse...
  16. mrrsm

    Amazon Product ARES Brake & PS Fluid Syringe - Pump - 29% OFF

    If you want to ensure of achieving the CLEANEST and Most COMPLETE R&R of your Old, Contaminated, Water Saturated “Ugly, Rusty Brown” Brake or Power Steering Fluid… then carefully evacuating either the Master Cylinder or the PS Fluid Reservoir down to their correct levels... and in particular...
  17. mrrsm

    NEED HELP Shifter locked in neutral

    You definitely have the Correct "Orange" Dorman Kit... but those Two Parts are NOT Intuitive for an EZ Installation:
  18. mrrsm

    NEED HELP No trailer brakes with factory integrated brake controller.

    You've probably already viewed this from another resource.... But JIK not as yet... The Factory Owner's Manual for the 2012 GMC Yukon has THIS information in Chapter 9-79 about that Trailer Hitch Seven Pin Electrical Connector: Excerpt from this Downloadable Source PDF...
  19. mrrsm

    Oil filter autopsy after MMO

    Nice Work and a Fast Follow Up... If you look at just one of the Symmetrical, Rectangular Shaped "Carbon Wafer" nested inside of the Fan-Folds high-lighted in Red & Yellow in this Blow Up of one of your images attached below: ...You can see how this stuff literally 'cleaves off' of built-up...
  20. mrrsm

    Tool Talk

    In this Video from Paul “Scanner” Danner, we observe him ‘Thrashing Out’ a Ford “Crown Vic” after someone unloaded a ***HUGE Wad of Cash*** for a Full Box of Parts Buckshot after NOT solving all of the No Crank-No Start-No Comms Issues. THIS is a Classic Case Study that ends well through The Use...
  21. mrrsm

    Looking for good source for bolts and nuts

    https://autofastenersandclips.com/
  22. mrrsm

    NEED HELP Shifter locked in neutral

    "When Sorrows come... They come not as Single Spies... But in Battalions..." Shakespeare's "Hamlet", Act IV, Scene V
  23. mrrsm

    Tool Talk

    I Ordered and Received the Two Lighted Probes shown below… JUST so I can have BOTH available as Quality Circuit Test Lights in my Tool Chest-Bags and to Research and Document the Implications of their Use: A Comparative Test Probe Basics Primer: Craftsman Model #CMMT14103: $17.00 @ Amazon...
  24. mrrsm

    Port-matching 4.2 head

    ...and now... all that remains to be done is to obtain a Brand New Dorman Exhaust Manifold Model # 674-777 and after giving it a "Splash of Dykem Blue" across the EM smooth mating surfaces ... Precisely Scribe out that Same, New OEM MLS Gasket you used on the Aluminum Head and then ...Well...You...
  25. mrrsm

    What came in your mail today?

    This was STRANGE... Yesterday...I received an Oversized Manila Envelope (No Return Address) with THIS Item inside: I can only surmise that with its OEM Marvel Comic Book Colors... That it was supposed to be sent to Peter Parker*** but somehow.. it wound up at my House...OR... Perhaps...
  26. mrrsm

    Hoisting "The Pain" out of PITA Truck Bed R&Rs

    So Now HERE is Very Cool Thing... I poked around over on Amazon looking for a Gambrel Rig like the one this Dude used in his 'Successful Garage Hoisting Experiment' and found that this inexpensive Rack, Rope & Pulley Rig comes complete with a 4:1 Ratio of Mechanical Advantage via Steel Block &...
  27. mrrsm

    SOLVED! Locked in Park, Won't activate starter (or click)...?

    I'm not sure whether your response is meant as "Praise"...or "Chastisement" for knowing the answer to your Question... :blinkhuh:
  28. mrrsm

    Amazon Product Ozark Trail Collapse-Able Truck

    My wife and I minimize our exposure to people with Covid-19 by ordering our Fresh Foods via "Amazon Fresh" that provides pretty reliable Uber Delivery Service. So that Last Dude that showed up reached inside his Open Hatchback and brought out THIS Thing...and with the same aplomb as Opening an...
  29. mrrsm

    SOLVED! Locked in Park, Won't activate starter (or click)...?

    @MAY03LT Very Nicely Explains WHAT that "Red Wire" IS... WHERE it is supposed GO...and WHAT it is Supposed to DO: [Thanks, Drew... :>) ]
  30. mrrsm

    NEED HELP Shifter locked in neutral

    See Post #6 for GM ACDelco Shifter Cable Un-Boxing Images and related information: https://gmtnation.com/forums/threads/locked-in-park-wont-activate-starter-or-click.22987/

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