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Anybody have a line on dead PCM's? I need a couple different ones. Any Hummer 6.5TD 96- 01 version will work on the one hand. The other one i really need is OBD1 from 1993-95 and is not found in Hummers but in heavy duty GM pickups that use the 5068 IP's. Part# 16183977 ECM (1994-1995) or...

Hey guys. I working on a small project and need to measure engine oil temps or get some data on what our average peak oil temps might be. I have not been able to find any info as of yet. Wondering if anyone here has installed a temp sensor for this and where is the best place to install it to...

Hey guys, Happy Holidays. I am wondering what the current draw is on the fuel heater element inside the FM. I want to devise a relay and transformer to run this on my block heater curcuit so i can keep the fuel warm inside the filter while the truck is shut down in the cold winter. Involves a...

Anyone know how this works?? Is there a thermostat inside the element? I does not appear to be switched and comes on with ignition.

Anyone ever come up with a manual control system for the DS4 pump and the 4l80e transmission effectively bypassing the computer?? Further more, anybody done it on the fly along with time setting?? Anyway thought i would ask!! It hit me when i was fixing an automated audio mixing board today at...

OK I can't find the thread on this that i know is here somewhere. I was having a discussion on another forum (HML Hummer mailing list) about the different pre chambers and applications. I need some clarification on the different precups and associated part numbers. In the hummer world which i...

I bought my hmc4 back in 2000. The first lift pump lasted 70k miles. Since then i have gone through 4 in half as many miles. I put it down to cheap manufacturing with cheap materials. Having recently completed the FTB mod the search has been on now for a better HO pump for the truck. I chose...

OK so i bought the raptor rp 150 to install in the hummer. Over the phone i was told it took 1/2 inch fittings so i went and bought fittings. They dont fit!! So im wondering as i can't seem to get a straight answer from the vendor,, What fittings go in and out of the raptor pump?? I want to go...

Anyone have a need for a 10inch rear end repair kit. Comes with ring, pinion and bearings etc. I won it at a truck meet and have no use for it. I will post back the ratio later when i get to the shop. I am in Toronto.

Old news i know, but can someone point me in a direction where i can find out more about the details of this practice of filling the water jacket with Hydra Cement.?? Much thanks!!

Turbine Doc and others had posted info on this and i had found a link for it online which got me here, and signed up. That was a month ago or something. Since, i have completed the FTB mod on my truck. I have a stock TD. My truck had a few slight differences but the basics of the mod were the...

Hey guys!! I come here chasing a thread on FTB that was started by Turbine Doc. Just saying thanks for the great site and info. Anyway thought i would join up. My ride is a 97 HMC4 with an at risk motor and 126k miles Here is a pic.