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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 offline
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Have you ever changed you ignition switch?
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  #3  
Old 01-18-2020, 01:14 PM
snarl snarl is offline
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No I haven't.
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  #4  
Old 01-19-2020, 11:19 AM
Yukon6.2 Yukon6.2 is offline
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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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  #5  
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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  #6  
Old 01-20-2020, 10:19 AM
Yukon6.2 Yukon6.2 is offline
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Not on my 98 or 04 they were mounted on the column behind the key tumbler.
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  #7  
Old 01-20-2020, 01:53 PM
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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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  #8  
Old 01-21-2020, 12:38 PM
Yukon6.2 Yukon6.2 is offline
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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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  #9  
Old 01-22-2020, 05:43 AM
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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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  #10  
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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  #11  
Old 03-16-2020, 02:36 PM
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PCM was bad.
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  #12  
Old 03-17-2020, 06:32 AM
DieselDavy DieselDavy is offline
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Thanks for reporting back! It's always nice to know how things turned out.
How old/miles was the PCM?
Dave
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  #13  
Old 03-21-2020, 06:39 PM
snarl snarl is offline
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Original as far as I know. 285000 miles
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  #14  
Old 04-09-2020, 12:31 PM
phantom309 phantom309 is offline
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Quote:
Originally Posted by snarl View Post
Original as far as I know. 285000 miles
I'm a little confused your original post states otherwise,.??
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  #15  
Old 04-09-2020, 04:15 PM
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Quote:
Originally Posted by phantom309 View Post
I'm a little confused your original post states otherwise,.??
PMD. PCM. Meh. Same thing.
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  #16  
Old 04-12-2020, 06:43 AM
phantom309 phantom309 is offline
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Quote:
Originally Posted by snarl;

New PMD and cable



Quote:
Originally Posted by DmaxMaverick View Post
PMD. PCM. Meh. Same thing.
You think i'm new here,?
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  #17  
Old 04-13-2020, 07:36 AM
snarl snarl is offline
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??????
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  #18  
Old 04-13-2020, 07:55 AM
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Quote:
Originally Posted by snarl View Post
??????
(Ditto)


snarl (original post):
Quote:
New PMD and cable
Quote:
PCM was bad.
DieselDavy:
Quote:
How old/miles was the PCM?
snarl:
Quote:
Original as far as I know. 285000 miles
phantom309:
Quote:
I'm a little confused your original post states otherwise,.??
Me:
Quote:
PMD. PCM. Meh. Same thing.
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  #19  
Old 04-15-2020, 09:56 AM
snarl snarl is offline
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PMD- Pump mounted driver
PCM - Powertrain control module (the computer)
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  #20  
Old 04-16-2020, 09:06 AM
Kennedy Kennedy is offline
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Quote:
Originally Posted by snarl View Post
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.

Is this a southern thing or something?
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