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So I have never been into a 3800 series 2, and I am on the road currently so cant check, are the coolant elbows serviceable seperately then? As in the lower can stay in place? What is the usual failure, plastic splits and pee's coolant all over?

Hey all, I am going through the front end on the 95 GMC K2500HD, after 441,000 miles the front unit bearings are tripping the ABS light. So i ask you guys, how often does the inner knuckle seal need changed? GM PN: 15589666 Is there anything else that needs replaced when the wheel bearings...

tagging for later.

So @THEFERMANATOR what would you suggest I go with on the gasket for the upper? Thanks!

Hey all, I have the dreaded #5 miss fire and coolant consumption on my Sister's 2000 Pontiac Bonneville with the 3800 Series 2 engine. I was on Rockauto.com and was picking out parts, and was curious what was recommended fr gaskets? The blue OE grade Delco is this number: 12573662 The black...

OK, it turned out pretty well, swapped ECM, did the (3) 10 minute key on cycles, and the P0606 code is gone, and it now responds properly with every turn of the key. I am still tracing IP issues, but I think we are now on the downhill slide of figuring this ol girl out.

Pretty low

I have a 99 engine that I snagged from an auction with a hole in the pan that I plan to get the IP off of, but the injectors may have been the cause of the hole, so I better have them re-done. :)

Hey all, I am looking for a set of Nerf bars/ tube steps for the 06 C3500 Reg. cab. What is the best quality? I would prefer to make this purchase once. I am probably looking for either stainless or a high quality chrome. I think I am only going to like the traditional looking 4 inch ones, I...

unplugged the crank sensor, and she ran continuously, so it seems passlock is not an issue. Still stumbles and runs rough, fluctuating RPM, etc. with the crank sensor unplugged.

OK, swapped ECMs today, and that helped, dash lights up and she will fire up every time now. The swap got rid of all the codes except P0251, which probably means its IP time, unless I want to risk a runaway and do the optical sensor myself. It will run for about 30 seconds and then stall...

So the conclusion is that all I need to do is install the ECM, and do the passlock relearn and I should be good to go?

Hey all, Its ECM time on the bomber 98. I was curious if anyone could give me some pointers on swapping ECMs on a 98 6.5L with passlock. The Gm books are talking about programming the ECM. Is this back when the ECM would show up "blank" and needed programmed for the application? I assumed as...

https://denver.craigslist.org/rvs/d/1985-coachman-diesel/6495711670.html

find the OEM setup in a salvage yard.

Looks good so far! So are you going to run a dedicated pump, or piggyback off the power steering pump?

well, if you keep the 6.5L pickup and find yourself in need of assistance out in western KS or eastern CO, look me up. :)

I am chasing similar issues on my 98 K2500, and I would recommend at least trying an ignition switch before writing off the ECM. That said, ignition switch didint fix mine, but hopefully it will fix yours. :)

@razur65 hopefully we didnt scare you away. :) Have you had the truck long? IMO I would get it healthy and see what she can do. Keep in mind torque does alot, you dont really need alot of power. here is what mine can do on stock power and cooling. That said, mine are 5 speeds, so more power to...

The goal was sell the 99. :) but if you are thinking of moving that negates the whole reason to shop for older. :)