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Hi guys, as some of you may know my truck is a former ambulance. I have removed the two ambulance batteries which were connected to the two engine batteries. The truck is also equipped with dual alternators. Can anybody direct me to the right place to find the wiring diagram?

Wow! Thanks, guys for the abundance of information here! One thing is for sure I am deleting the Airtex pump from the cart!

Yea, as Forest Gump says "You never know what you're gonna get" on ebay. For my purposes the balanced flow kit from Leroy Diesel looks like a good deal @ $380.00 for the pump, clutch and fan blade.

Thank you Will L., I knew there had to be a better way. My truck will be laid up for a while because I'm doing an RV/Expedition build so I want to do the necessary upgrades for reliability and possible towing. I will be replacing the a/c compressor and the receiver dryer anyway. The truck...

Hi guys, I'm about to pull the trigger on a 99-2000 Airtex water pump for my 1996 C3500. I am interested in all your opinions.

Last time on "Do I need Retainer Rings On My Dually?", I decided to sacrifice my Pheonix wheel covers so that I could use the centers to reuse the center caps. Basically, because the attachment points for the center caps are attached to the stainless steel part of the wheel covers. I have...

Thank you! I appreciate the offer but I think that I'll sacrifice the simulators and use the retainers so that I can use the center caps.

Thank you for clearing that up!

Getting rid of the stainless steel wheel simulators. They have the steel retainer rings attached to the back of each simulator. I've been searching for bare rings online and haven't had any luck. Do I need those rings or can I just tighten the lugs directly to the wheels? I could pull them off...

Sorry, it took me a while to get back to you. I have two other projects on my plate and the truck has to wait its turn. I do have a couple of pictures. The second picture is of under the hood to the back passenger side where the grounds are.

I've been busy with other projects but due to the miles of extra wiring looms in an ambulance I am having a hard time finding the right tool combination to get back there!

How about the Duramax fan blade?

I've heard that the Bosch injectors are a good choice. Has anybody upgraded to the higher flowing water pump?

Thank you! I kinda figured I needed to clean the grounds first so thank you for confirming that and searching for fixes.

I found the grounds and am treating both with blaster penetrating spray. Also, read the SES and came up with P0758.

Yes, the SES light is on. I will be picking up a loaner OBD2 code reader from the parts store. Thanks for everyone's input.

Shifts into all gears and moves in reverse and forward but will not upshift out of first when in drive.

Thank you! I will try that and let you know.

Hello all, I'm new here and have a 1996 GMC C3500 Dually 6.5l 116,000 miles. Trying to get more info on 4l80E trans stuck in first gear any help would be appreciated. The truck is a former ambulance from a small town in Mass. I drove it across the country to NW Washington State where I live. I...