Recent content by spfautsch

Circling back around to this thread for an update. I wish I had some definitive proof of fixing this issue, but cannot report such technical mastery. Here's what I can report - since killing another T42 back in September of 2024, and having relocated the TCM to being zip-tied to the negative...

Just wanted to drop in with an anecdotal update. After going through 3 "new" actuators from Rock Auto, all 3 set a code indicating open (B0145-13 / B0428-13) and would not pass the recalibration routine. I started to wonder if there was a wiring issue, but when I would switch positions with the...

I know this is an old thread, but wanted to thank the OP and later contributors. Saved me numerous curse words. 3 hours start to finish in my driveway. Someone has done this job previously so the clips for the battery cable and CPS / solenoid looms were noticeably absent. I was able to get the...

Though I initially came here searching for another problem, I noticed this and it's ironic. The irony being my rear mode actuator ('06 Envoy XL) had been working perfectly since April 30th of this year. When I first acquired the vehicle back in fall of 2023 both the rear actuators reduction...

As I can't seem to edit any of my posts here I will re-iterate DO NOT BUY FEL-PRO BRANDED HEAD BOLTS FOR THIS JOB AT ANY PRICE!!! Even if free you will likely regret your decision. I'm old-school, and this torque-to-yield stuff is something I've never trusted. Seems to be another cost saving...

Well as with all good stories, this one ends with a twist. Was running great and no issues to report save for the fact that the oil level seemed to be gradually increasing. After about 350 miles I drained about 6 oz of oil out that looked a lot like Guinness. Awesome, a head gasket is...

Not to mention my newest pet peeve, gas direct injection. While it does improve economy, it does so at the expense of low end torque and contributes to excess carbon and oil fouling. Former GM Powertrain Engineer REVEALS Truth on Quality Issues This is another very long interview that is worth...

One other pointer I forgot to add - while you have the A/C system purged (and you're replacing all the seals w/ new) it would be wise to pull the receiver / dryer and inspect it for corrosion. This is the second one of these I've witnessed personally. Though this one wasn't overtly leaking, the...

Got to drive it about 150 miles round-trip yesterday, running like a top and no lifters ticking! The DIC fuel consumption average is reporting 17.2 mpg for the current tank, half of which was driven before the mechanical delete. Since disabling AFM I've been seeing about 5-10% better calculated...

I forgot to post this nugget yesterday. At some point in the last 60 days I disabled AFM by plugging off the brake booster MAP sensor. Can you spot a noticeable dip in fuel economy? I cant.

This is sort of a follow-up on a question thread I posted several weeks ago that turned into a bit of a flamer and has since been mercifully deleted. Apologies to @TollKeeper, but I think I have sufficiently answered the why now. As I'm waiting on some parts and wont be able to finish this job...

I understand that completely. I referenced it as a MAP sensor because that's what it is - a Manifold Absolute Pressure sensor. Except the manifold this one measures is the brake booster body. I was simply trying something different from disconnecting it electrically to see if it would maybe...

While it's possible I'm twisting your words a bit, I would strongly disagree that the API-graded blends the quick-lube places purchase in 275 gallon skid-totes are remotely equivalent to off-the-shelf synthetics that contain only PAO base stocks or better. My opinion is that those API ratings...

While I respect what you're saying, I'm not sure I'm in complete consensus that the AFM system is massively failure prone in and of itself. I doubt this lengthy dialog will change your mind, but you should take it into deep consideration the next time you parrot out a claim that the AFM system...

Update, after a short bit of deliberation and consulting with my mechanic friends I pulled the trigger on a parts order from RA. Complete engine gasket kit (including valve guide seals), head bolts, 8 new DOD lifters, 4 guide trays and a filter screen for $550 shipped (after some store credits I...