# Service bulletin 01993

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10006964
- Published by NHTSA: 2004\-05\-20
- Manufacturer's number: 01993
- Manufacturer's date: 2004\-01\-01
- NHTSA component: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY

## NHTSA's summary

ELIMINATION OF REAR FUEL TANK HEAT SHIELD. \*MR

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Fuel system, Fuel tank

## Vehicles listed

- 2003 to 2004 CADILLAC ESCALADE
- 2003 to 2004 CHEVROLET TAHOE
- 2003 to 2004 GMC YUKON
- 2003 to 2004 GMC YUKON DENALI

## Other bulletins for the same vehicles and component

- [PIT4943D](/bulletins/10114954.md), 2017-08-15, Service bulletin: FUEL SYSTEM, GASOLINE; FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp. Technician may find Diagnostic Trouble Code P0442. Technician will need to review Techlink article from May 2013 titled "Using the Evaporative Emissions System Tester" Technician will need to follow these steps to help diagnose the issue. First after the P0442 has been verified do not disturb any of the fuel system components. The technician now can use the scan tool to close the Evaporative Emissions System. If possible change the tank pressure sensor units from inch\_H2O to milimeter\_Hg for better resolution. Now the vehicle can be stared to monitor the tank pressure sensor output value for approximately two minutes. If the tank pressure sensor value does change, pressurize the fuel tank side of the purge solenoid with the GE 41413\-A / J 41413\-A and the necessary adaptors. Now add smoke and allow pressure to stabilize for 2 minutes. If smoke is allowed to pass through the purge solenoid, replace the purge solenoid. If the tank pressure sensor value does not change, then install CH\-48096 adaptor between the purge line from the canister and the purge solenoid. With the Evaporative Emissions System closed, pressurize the system through the CH\-48096 adaptor and allow the system to completely stabilize, by observing the Press / Vac Gauge for a minimum of 5 minutes. Now add smoke to the system with GE 41413\-A / J 41413\-A after system stabilization. Now inspect the purge solenoid, engine side, fuel cap, canister vent solenoid filter and any line quick connects. When the leak is unable to be located, test under a vacuum condition. his type of leak may be detected by using the scan tool Purge/Seal function to create a vacuum in the Evaporative Emissions System and then observe the FTP sensor parameter for vacuum decay.
- [3110](/bulletins/10010025.md), 2004-11-04, Service bulletin: FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES. ERRATIC OIL PRESSURE WITH DIAGNOSTIC TROUBLE CODE'S P0522 AND/OR P0523. \*SC
- [04082004](/bulletins/10009213.md), 2004-09-17, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY. SERVICE PART FUEL TANKS WILL NO LONGER HAVE THE RETAINER NUBS FOR THE REAR HEAT SHIELD EXTENSION. THE REAR HEAT SHIELD EXTENSION IS NO LONGER NEEDED AND SHOULD NOT BE REINSTALLED ON FUEL TANKS WITHOUT THE RETAINER NUB. \*TT
- [01588A](/bulletins/10007280.md), 2004-06-09, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP. FUEL CAP TETHER STRAP TOO SHORT. \*TT
- [01998](/bulletins/10006955.md), 2004-05-20, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY. ELIMINATION OF REAR FUEL TANK HEAT SHIELD. \*MR
- [01588](/bulletins/10005427.md), 2004-02-25, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP. CHANGE IN GAS CAP TETHER ATTACHMENT POINT. SERVICE VME. SIT BULLETIN 1414321. \*TT
- [01332A](/bulletins/10005408.md), 2004-02-25, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP. TIGHTEN FUEL CAP MESSAGE ON THE DIC. SIT BULLETIN 1411567. \*TT
- [01332](/bulletins/10004107.md), 2003-11-19, Service bulletin: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP. DIC MESSAGE THAT THE FUEL CAP IS NOT ON TIGHT. SERVICE VME. \*TT

JSON: [/v1/bulletins/10006964](/v1/bulletins/10006964)

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