Been BUSY at the shop, Mostly work for car lots & auto repair shops...Which means electrical diag & repair!
2020 Suburban 5.3L/6L80, Intermittent no crank.....Needs a starter. The car lot paid the diag fee instead of letting me install a starter??
2008 Sierra 3500 LMM Duramax/Allison 1000.....Short to ground on the turn signal circuit blowing the left turn signal BCM fuse. Left front door harness was a mess, The short was caused by someone pinching the mirror harness while poorly installing the door panel....But also have several broken wires in the rubber flex bellow (Common GMT900 problem)....Now all the windows go up & down!
Air Bag light on & service airbag message in DIC....No communication with SDM (airbag module), Checked for power & grounds at the module along with the Serial Data waveform (Single wire GMLAN) via the Pico. Module was heavily corroded/oxidized but the connector & terminals looked great.
Advised the dealer it needed a new SDM.....This is a relatively new client & got a little push back on my diag stating that it had codes in the module & his "scan tool" would communicate with the SDM. Said you're more than welcome to get a second opinion & I'll wave the diag fee.....However, If you bring it back here wanting a SDM.....I will charge you that diag fee on top of the repair!
He decided to go buy a new SDM from the dealer & let me install it, I warned him that there could be other component problems in the airbag system that can't be easily diagnosed with a dead SDM & that it may need more than simple coding via a scan tool.
He brings the new module saying the parts guy said it's "Plug & Play", I said "We'll see about that". Of course it was not plug & play.....The scan tool would do the handshake between the BCM & SDM but would not configure the module (Tried my Tech2, Autel Elite, & Snap-on Solus Plus).
Called him & said I need to program the module with GM SPS3.....More push back because what the parts guy said, I'm getting frustrated at this point & said take it to the parts guy & have him configure the module correctly! He all the sudden changed his tune like he hasn't pushed back all day?? I think he's trying to see how far he can take things.....If he brings another car & continues this I'll run him off as I don't have time for it!!!!!
BTW...Once the SDM was programmed via SPS3....The scan tool would finish configuring/coding the module. No component DTC's like the owner stated!
2012 Ford F150 3.5L Ecoboost/6R80 4x4, Auction Rat. Dealer bought it cheap knowing it needs engine work.
I think it broke the primary timing chain by the way it sounds cranking it (No compression). Pulling the cab to inspect the engine.
Got almost ready to lift the cab except for the heater hoses, I was out of gas for the day....For the week truth be told!! It will be there Monday.
The two captured nut broke loose from their cages on the two core support mount bolts....If you know you know!
Decided to make a special tool to back-up the nuts with a socket, Had a old 1/2" drive breaker bar.....Heated & bent it so it would clear the radiator. Had to heat & bend it twice

as it needs to be opposite to fit the other side. Going to buy a HF breaker bar & modify it so I have a left & right tool.