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Old 02-24-2016, 09:29 AM   #6 (permalink)
JMJNet
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Join Date: Feb 2006
Location: Richardson, TX
Posts: 17,245

A lot of things in this truck does not code, even for a 99.

For it to code, there should be a sensor of some sort.
There is no sensor in the Lift Pump or PMD.

A lot of codes are to warn about Injector Pump conditions or boost condition.
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1995 GMC Suburban:
PMD in Bumper
Leroy Diesel Flight System PMD
Leroy Diesel Oil Cooler Line
4" Warpspeed Exhaust
Kennedy Diesel LP/OPS Harness
Bosch Duraterm GP
Heath Turbo-Master
AD244 Alternator
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