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6.5L Turbo Diesel - Tech Support - Troubleshooting - Performance 1992-00 6.5L Turbo Diesel - Welcome to the Internet's first discussion forum for the 6.5L diesel engine. Tips on performance, upgrades, cooling, fuel economy, troubleshooting and more.

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  #1  
Old 01-18-2020, 07:43 AM
snarl snarl is offline
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Default Crank no start

So Friday I had a fishbite and stall episode. Pulled over truck started fine and ran great rest of the day. Saturday truck starts fine, run some errands and proceed to replace water pump and radiator. I had disconnected the positive cables. Got that all done and now the truck won't start.

New PMD and cable
Gutted fss
Have fuel to ffm,out of air bleed,out of drain and to injection pump
Fuel in clear retun line, moves a little when cranking
Tried cranking with optical sensor unplugged and cps unplugged, no difference
Have SES light when cranking. (power to ecm)
No fuel out injector lines.
Tried both pmd without extension harness
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  #2  
Old 01-18-2020, 12:05 PM
Yukon6.2 Yukon6.2 is online now
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Have you ever changed you ignition switch?
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90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews
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Old 01-18-2020, 01:14 PM
snarl snarl is offline
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No I haven't.
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Old 01-19-2020, 11:19 AM
Yukon6.2 Yukon6.2 is online now
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My 98 has a bunch of electrical issues that went away after changing the switch.
Same on my 2004 Topkick.
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90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews
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Old 01-19-2020, 07:26 PM
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a5150nut a5150nut is offline
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Ignition switch is little box on lower steering column not the key cylinder.
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Old 01-20-2020, 10:19 AM
Yukon6.2 Yukon6.2 is online now
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Not on my 98 or 04 they were mounted on the column behind the key tumbler.
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90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews
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Old 01-20-2020, 01:53 PM
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Robyn Robyn is online now
Missy Good Wench ( Moderator)
 
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Every GM I have owned had the switch on the top of the column about 6 inches or so down toward the firewall from the key unit.

There is a rod that connects the sliding switch to the key/lock unit.

Later ones that use the "chip key" may be different.
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Old 01-21-2020, 12:38 PM
Yukon6.2 Yukon6.2 is online now
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No chip keys on my trucks
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90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews
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Old 01-22-2020, 05:43 AM
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Missy Good Wench ( Moderator)
 
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Our 2007 Avalanche has the chip key
Spendy to get extras made.

We only got one key with the rig....so had to get an extra.
The 07 does not have a locking column either....I was surprised at that.
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Old 01-26-2020, 06:47 AM
phantom309 phantom309 is offline
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When the batteries have been disconnected,. The first start the glow plugs cycle off very quickly.
Takes at least two tries,...
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