Category Archives: GM 6.5

GM/Detroit 6.5L ENGINE CONTROLS – Fuel Tank Replacement (Suburban)

Removal Procedure Tools Required J 36608 Fuel Sender Tool Caution: Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come In contact with a live exposed electrical terminal,… Read More »

GM/Detroit 6.5L ENGINE CONTROLS – Fuel Heater Replacement

Removal Procedure 1. Remove the upper intake manifold cover. 2. Open the air bleed valve on top of the fuel manager/filter to release any pressure in the fuel supply system. 3. Remove the mounting bolts that connect the fuel manager/filter to the intake manifold. 4. Remove the wiring harnesses and fuel hoses. 5. Remove the… Read More »

GM/Detroit 6.5L ENGINE CONTROLS – Water-in-Fuel Sensor Replacement

Removal Procedure 1. Loosen the upper intake manifold cover bolts. 2. Remove the upper intake manifold cover. 3. Open the air bleed valve on top of the fuel manager/filter to release any pressure in the fuel supply system. 4. Remove the mounting bolts that connect the fuel manager/filter to the intake manifold. 5. Remove the… Read More »

GM/Detroit 6.5L ENGINE CONTROLS – APP Module Replacement

Removal Procedure 1. Remove the negative battery cables. 2. Remove the electrical connector. 3. Remove the mounting bolts. 4. Remove the APP module. Installation Procedure 1. Install the APP module. Notice: Refer to Fastener Notice in Cautions and Notices. 2. Install the mounting bolts. Tighten Tighten the mounting bolts to 1 N-m (10 lb in)… Read More »

GM/Detroit 6.5L ENGINE CONTROLS – IAT Sensor Replacement

Removal Procedure 1. Remove the negative battery cables. 2. Remove the electrical connector. 3. Remove the IAT sensor Installation Procedure Notice: Refer to Fastener Notice in Cautions and Notices. 1. Install the I AT sensor. Tighten Tighten the IAT sensor to 25 N-m (18 lb ft). 2. Install the electrical connector. 3. Install the negative… Read More »

GM/Detroit 6.5L ENGINE CONTROLS – MAF Sensor Replacement

Removal Procedure 1. Loosen the turbocharger inlet duct clamp at the intake duct. 2. Disconnect the MAF sensor electrical connector. 3. Unfasten the air cleaner cover clips. 4. Remove the air fil ter, MAF sensor, and intake duct assembly from the air cleaner box. 5. Remove the air filter from the MAF sensor by pulling… Read More »

GM/Detroit 6.5L ENGINE CONTROLS – ECT Sensor Replacement

Removal Procedure Caution: Refer to Battery Disconnect Caution in General Information. 1. Remove the negative battery cab l es. 2. Drain the cooling system below the level of the sensor. 3. Remove the electrical connector by releasing the locking tab. 4. Remove the sensor. Installation Procedure Notice: Refer to Fastener Notice in Cautions and Notices.… Read More »

GM/Detroit 6.5L ENGINE CONTROLS – PCM Replacement/Programming

Service of the PCM shoul d normally consist of replacement of the PCM. If the diagnostic procedures call for replacing the PCM, peform the following procedures in the following order: 1. Programming the PCM 2. Passlock Learn Procedure 3. Programming the TDC Offset Removal Procedure Caution: Refer to Battery Disconnect Caution in Cautions and Notices.… Read More »