GMC C2500 Parts

GMC C2500 Parts Questions & Answers

• Intake Manifold, Lower
  12553837
  Q: How to service and repair the intake manifold on GMC C2500?

  A: The service and repair of an Intake Manifold starts with removing the manifold absolute pressure (MAP) sensor at the rear of the intake by following a step-by-step process to reattach it post-diligent cleaning and evaluation. Check the sealing grommet attached to the MAP Sensor for signs of damage or tear formation. Begin by disposing of the Intake Manifold-to-cylinder head gaskets before removing the Fuel Rail with its injectors and then the Throttle Body and gasket. Use a tool to uninstall the evaporative emissions (EVAP) purge solenoid unit along with its bolt and isolator parts. Use solvent and safety glasses to clean the Intake Manifold by concentrating on surfaces and internal passages of the gasket. Use compressed air to dry the Intake Manifold. The inspection should focus on evaluating the Throttle Body studs with inserts and the wire harness stud coupled with its insert and Fuel Rail bolt inserts for indications of loose threads or damaged fastenings. Examine all Intake Manifold vacuum passages for debris while also inspecting every vacuum fitting and MAP Sensor mounting bore for damage and checking the entire composite Intake Manifold assembly for cracks or damage especially between the intake runners. Systematically inspect all fuel injector bore and gasket sealing surfaces for excess damage or scoring as well as the cylinder head deck for warpage. Use a straight edge across the Intake Manifold cylinder head deck surface, positioning it over at least two runner port openings, and insert a feeler gauge; replacement of the Intake Manifold becomes necessary when warpage reaches more than 3 mm (0.118 inch) across a 200 mm (7.87 inch) area. After repairing the MAP Sensor and evap solenoid you must install both components before securing the evap solenoid bolt with a torque of 10 nm (89 inch lbs.).
• Tail Lamp Assembly, Driver Side
  5977867
  Q: How to replace the Tail Light/Turn Signal Lamp on GMC C2500?

  A: To replace the tail/turn signal lamp, first make sure the headlamp switch is in off position and reduce the end gate. Separate the 2 screws on which the tail/turn signal lamp assembly is fixed to the body and locate the bulb that has to be replaced: the top bulb lighting is a parking lamp and stop lamp, the middle bulb lighting is a turn indicator lamp, the lower one is a back up lamp. Turn the socket assembly to take it out of the housing. For the process of installation, torque the socket and tighten in position before reinstalling the tail/turn signal lamp to the vehicle using 2 screws. Lastly, close the end gate and check out the operation.
• Oxygen Sensor
  19178918
  Q: How to replace the Heated Oxygen Sensor (HO2S) for Bank 2 on GMC C2500?

  A: While replacing the heated Oxygen Sensor (HO2S) for the left bank 2, take care of the device as the in-line electric connector and louvered end should be free of grease, dirt, or contamination and do not apply any cleaning solvents. Too much force on removal might damage the threads of the Exhaust Pipe, and it might be possible to lower the exhaust system to have enough access. Start by lifting the vehicle and identifying the ho2s to be replaced. Remove the ho2s electrical connector and remove the sensor carefully. While installing the new sensor, apply anti-seize compound gm p/n 5613695 to the threads if required, since the compound will be helpful in future removal. Install the heated Oxygen Sensor and tighten it on 41 n.m (30 lb ft) and reconnecting the electrical connector and lowering the vehicle.
• Camshaft
  12552296
  Q: How to replace the camshaft on GMC C2500?

  A: Started with disconnecting the battery negative cable, then raising the hood following the hood hinge bolt into the servicing position. Start by draining the engine coolant before removing both Radiator hoses and the air cleaner duct and a/c condenser mounting bolts when present. Start by taking off the Radiator support and Radiator before the engine cooling fan and Drive Belt follow along with any additional a/c tools required. The service begins with engine sight shield removal followed by electrical wiring harness disconnection from the Water Pump and Thermostat Housing. Raising the vehicle allows technicians to uninstall the Starter motor, right side closeout cover and bolt and engine Oil Pan, crankshaft balancer, valve lifters, cylinder heads and engine front cover. After setting the timing marks on Camshaft and crankshaft sprockets at the correct firing position of piston number one remove the sprocket and Camshaft. A complete cleaning process must precede installation of both the new Camshaft and Camshaft sprocket together with the Timing Chain and valve lifters and cylinder heads. Installation begins with these components: engine front cover followed by engine Oil Pan and right side closeout cover and then Starter motor and crankshaft balancer and Water Pump. Then you should install the a/c Drive Belt when equipped before putting on the Drive Belt. Afterward, connect the electrical wiring harness to the Thermostat Housing. The repair procedure requires installation of the engine sight shield along with the Radiator support and Radiator before proceeding with the a/c condenser mounting bolts if equipped and engine cooling fan and air cleaner duct. To finish the procedure disconnect the battery negative cable then lower the hood.