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6.5L Diesel Engine Discuss the 6.5 GM diesel engine & associated components. Automatic transmission questions & problems belong in the 4L80/85 - 4L60E - 6L90 Transmission Forum

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Old 07-10-2019, 08:40 PM   #1 (permalink)
Phiberoptik
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A/C stops working while diving...

A/C stops working while diving and engine keeps ruining but when I shut it off and try to restart it I lose WTS and still no A/C and it won't start. Next day starts fine and A/C works, but stops again when vehicle gets to temp. Any suggestions?

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1996 Suburban 6.5L TD K2500 4 x 4 (F Vin), High idle switch, New IP DS4831-5521S, Remote mounted (gray) PMD, Remote mounted OPS, 160 Amp Alt., 2 New Die Hard Platinum Batteries, K&N Air filter in factory intake box, Retired Emergency 911 vehicle, White with tan interior and Cage behind the back seats, 20" rims w/285/50R20 Cooper Discoverer R/T tires, Diamond Eye Performance Exhaust; 3" down pipe & 4" pipe w/muffler straight back, new reman. vacuum pump, 2 new front windows as track on old ones rusted, new A/C blower resistor, always more to come...()

2000 Mazda 626 ES V6 (gasser) stock 103000 miles (wife's ride)

2005 Colorado (gasser) stock 65000 miles (2nd work truck) (SOLD)
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Old 07-11-2019, 02:18 AM   #2 (permalink)
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This has happened several times now? If you are not running the AC do you still have the issue?

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15 VW Golf wagon, TDI. Did the buyback on my 13 Jetta TDI wagon so it was basically a trade up.
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Old 07-11-2019, 10:12 AM   #3 (permalink)
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Once shut off it still will not start at all. Have to wait a few hours before it'll start again. When I turn the key and the A/C fan is blowing it will start. If the fan is not blowing then it won't start. The reason I'm adding the A/C into this is because while driving the air will stop working and kind of gives me a heads up that is not going to start once shut off. It's the only thing associated with the no start that I've noticed. Like it's on the same circuit?
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1996 Suburban 6.5L TD K2500 4 x 4 (F Vin), High idle switch, New IP DS4831-5521S, Remote mounted (gray) PMD, Remote mounted OPS, 160 Amp Alt., 2 New Die Hard Platinum Batteries, K&N Air filter in factory intake box, Retired Emergency 911 vehicle, White with tan interior and Cage behind the back seats, 20" rims w/285/50R20 Cooper Discoverer R/T tires, Diamond Eye Performance Exhaust; 3" down pipe & 4" pipe w/muffler straight back, new reman. vacuum pump, 2 new front windows as track on old ones rusted, new A/C blower resistor, always more to come...()

2000 Mazda 626 ES V6 (gasser) stock 103000 miles (wife's ride)

2005 Colorado (gasser) stock 65000 miles (2nd work truck) (SOLD)
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Old 07-11-2019, 12:58 PM   #4 (permalink)
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When the front a/c blower quits does the rear blower work?
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99 CREW LONG SRW C3500 work truck 199k+ mi. orig. motor & trans 4.10, modded engine harness, new oil cooler & lines, all new front end parts and poly bushings, trans poly mount, all new brakes.
96 SUBURBAN K2500 wife's truck 210k+ mi. orig. motor & trans, 3.73...
95 C2500 Suburban 6.5td HO w/p, timing set, HB & pulley, all rubber hoses, modded engine & main harness, converted to OBD2, PMD to bumper...
95 C1500 Suburban 6.5td rebuild tranny, convert to DB2, replacing as many parts as I can.
96 C2500 Suburban 7.4L converting to 6.5td w/ DB2, 4L80, 3.73
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Old 07-11-2019, 01:50 PM   #5 (permalink)
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No rear blower on this retired Fire Rescue Vehicle. However, I believe I've found the problem. After checking fuses and voltage to and from the GP relay etc., I found the ground wire on passenger side near the trans dip stick was loose. Tight now and no more problem. I love this forum...! Thank you guys...!!! 👍
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1996 Suburban 6.5L TD K2500 4 x 4 (F Vin), High idle switch, New IP DS4831-5521S, Remote mounted (gray) PMD, Remote mounted OPS, 160 Amp Alt., 2 New Die Hard Platinum Batteries, K&N Air filter in factory intake box, Retired Emergency 911 vehicle, White with tan interior and Cage behind the back seats, 20" rims w/285/50R20 Cooper Discoverer R/T tires, Diamond Eye Performance Exhaust; 3" down pipe & 4" pipe w/muffler straight back, new reman. vacuum pump, 2 new front windows as track on old ones rusted, new A/C blower resistor, always more to come...()

2000 Mazda 626 ES V6 (gasser) stock 103000 miles (wife's ride)

2005 Colorado (gasser) stock 65000 miles (2nd work truck) (SOLD)

Last edited by Phiberoptik; 07-11-2019 at 01:51 PM.
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Old 07-11-2019, 02:07 PM   #6 (permalink)
Glagulator
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That was next. Make sure all the grounds, (3 or 4) at the rear of the pass. side head are good and also the body to frame to engine grounds.
Glad you got it going.
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99 CREW LONG SRW C3500 work truck 199k+ mi. orig. motor & trans 4.10, modded engine harness, new oil cooler & lines, all new front end parts and poly bushings, trans poly mount, all new brakes.
96 SUBURBAN K2500 wife's truck 210k+ mi. orig. motor & trans, 3.73...
95 C2500 Suburban 6.5td HO w/p, timing set, HB & pulley, all rubber hoses, modded engine & main harness, converted to OBD2, PMD to bumper...
95 C1500 Suburban 6.5td rebuild tranny, convert to DB2, replacing as many parts as I can.
96 C2500 Suburban 7.4L converting to 6.5td w/ DB2, 4L80, 3.73
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