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It's been another 5 years and I found the info very helpful to me. Thanks for posting!!!

OK, I did some more on-line research and found that the batteries are wired correctly. I also learned that part behind the air cleaner is the GP resistors, but appears to have been disconnected. So now I'm curious why this was disconnected? What else should I look for in the GP system...

Someplace on this site I had found the electrical schematics for the M1009, I can not find them again. If you have a link to them to share I would appreciate it. The truck starts and runs fine. Well it starts when it's warm. While checking the glow plugs I discovered the batteries are...

THANKS!!! I did find the resistance test in the Service Manual after making that post and will be doing some testing this evening. AC13G and AC60G, these are the 24v GP's? What is the difference in the two?

So then to check GP's I should be able to test the voltage at each GP, if it's higher then 24v I have bad GP's? Would the bad GP have 0v at the GP electrical connection? I just purchased this truck and it starts real hard in the cold. I do believe I will find multiple bad GP's and was...

Just over 700 miles in 2 days. 19 mpg. With a 7 foot snowplow on the front My son located and looked over this truck for me and handled the purchase. It’s the first vehicle I ever bought with out checking it out my self. I guess I taught him well and am happy with what he found. it’s an 85...

Made it from McComb, OH to my daughters house in Westfield, NY. Heading out in about an hour and taking the southern route. Only concern I have is it seams to have no power around 30-45mph. From a stand still it takes off fine. Above that speed and it runs right along. But in that range of you...

Thanks for the offer. I’m taking the train to Ohio. I found a spare in Toledo.

Thank you! The truck is in Ohio with no spare. Trying to get a spare for it before driving back to NY this weekend.

I have an 85 D10 Blazer with the 31 10.5 tires. What is the wheel width? The truck is in Ohio, I’m in New York so I can’t simply measure it myself. Thanks.