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Yeah, not paying that kind of money, nor paying that monthly online fee... thanks, though. OK, replaced ground strap from firewall to frame. Couldn't get to the bolt on back of block on passenger side, but strap is solid- ran a 10ga redundant from main battery ground at front of intake to...

Well, these dad gum things aren't the easiest to work on... just high enough from the ground to make bending over the fender a pain. Back in the day, Chilton used to make nice hardbound repair manuals for vehicles, with complete wiring diagrams and hose routing. Can't get them anymore, except...

1) You're very welcome... 46 yrs. later, I still see no point in the 'Nam/Cambodian affair. Except a lot of people died so the ruling class could make more money. 2) I'm still trying to figure where the trans grounds- someone said elsewhere there's a braided strap bundle with the starter wires...

UPDATE: Found a broken ground strap. Stud on front of dash captures a braided strap from frame rail, and back of engine somewhere- haven't checked location yet. The one to the frame rail was hanging on by a strand. Those straps are $5.99 and 18" long from Auto Zone. Think I'll run one from trans...

Yessir, E6, 18F...1st/5th SFG (Airborne)...many, many years ago.

Hey, Will K., thanks a lot!...seems highly applicable for these crazy times we're going through at present...HOOAH!

Correct. The ECM then grounds to the thermostat housing, I believe. Have to figure out the voltage drop from the battery to the fuse block. The only thing in between is the ignition switch, and the grounds, of course. The main ground coming from battery to front intake manifold stud looks a bit...

Hello- 1994 GMC C1500 2WD 5.7 showing DTC 66, 67, 81, 82. Appears to be no power to trans, started about a week ago intermittently, and now permanently. Find it extremely unlikely all 4 components tied to the above codes would fail at once. Suspect Ignition Switch (common anomaly) or ground...

Hi- New to Truck Stop. Have a 1994 GMC C1500 2WD 5.7 whose 4L60E is acting up. Fairly sure it's a grounding issue, or no power to trans due to ignition switch (common anomaly). DTC 66, 67, 81, 82 all at once. Extremely hard to believe all solenoids would fail at same time. Need ground locations...