C 1500 Truck 2WD V8-393 6.5L DSL Turbo (1994)
Fuel: All Technical Service Bulletins
Fuel - PROM ID for Diesel Injection Pump For VIN F
INFORMATION
Bulletin No.: 08-06-04-031
Date: May 20, 2008
Subject:
L65, PROM Identification Required When Ordering Diesel Injection Pump On 1994 Model Vehicles
Models:
1994 Chevrolet Silverado, Cab Chassis
1994 GMC Sierra, Cab Chassis
with 6.5L Diesel Engine (VIN F - RPO L65)
Attention:
GMSPO replacement Diesel fuel injection pump P/Ns 17800076 (High Flow) and 17800077 (Low Flow) are for retail sales ONLY and are not to be
used nor covered on vehicles that fall within the terms of Special Coverage Policy 00064, 11 years 193,000 km (120,000 miles). For vehicles
covered under the terms of Special Coverage Policy 00064, replacement pumps are to be obtained from GM Powertrain Diesel Group through
Technical Assistance Center.
Important:
Incorrectly ordered pumps will not be covered under the terms of GM Parts Replacement Warranty terms.
When ordering Service replacement 6.5L diesel injection pumps for 1994 model trucks, it is imperative that the PCM Calibration (PROM ID) be
cross-referenced when ordering the correct service replacement diesel injection pump.
In the 1994 model year, there were two fuel injection pumps available. Depending on the model/calibration, the vehicle could have either a low flow or
high flow injection pump.
If a high flow pump is installed in the place of a low flow pump (or vice versa) there will be engine driveability concerns induced.
If an injection pump mismatch has occurred, the injection pump fuel rate is the best way to verify the concern. Normal injection pump fuel rates are
between 10 and 13 m/m at idle. If a very low or very high fuel rate reading is found, there may be a pump/PROM mis-match.
The PROM ID must be obtained from the subject vehicle using a TECH I(R) or TECH 2(R) scan tool and then cross referencing to the listed PROM
ID's.
Shown above are the Broadcast / PROM ID codes that were designed to be used with the high flow injection pumps (17800076). If the vehicle's
Broadcast / PROM ID codes are not listed in the chart the vehicle would use the low flow diesel injection pump.
The scan ID's shown above are listed from left to right depending on the date of the vehicle build. PROM's farthest to the right are the most updated or
newest for RPO L65- VIN Code F application. Any of them will work with the high flow pump.
Disclaimer
