GM 15092802
Muffler Insulator

Maintenance of exhaust muffler insulator, hanger and bracket for vehicles with 1500 and LC9, LMG, LY5 or L76 engines starts with vehicle elevation and support. For safety purposes always wear protective gloves together with goggles. Dual attention must be given to servicing exhaust system insulators one at a time in order to preserve exhaust system support while abstaining from oil-based lubrication. The removal process of the hanger becomes easier by applying soap to both the frame support bracket rod and exhaust pipe hanger rod. Free the exhaust pipe hanger apart from its connections to both the frame support bracket rod and the exhaust pipe hanger rod. A soapy solution helps installation by being applied to the frame support bracket rod and exhaust pipe hanger rod and the exhaust pipe hanger inner diameter. Put the exhaust pipe hanger on top of the frame support bracket rod and exhaust pipe hanger rod before lowering the vehicle.

Service and repair work on the Exhaust Pipe/muffler hanger should begin by raising and properly supporting the vehicle beforehand. It is crucial to service exhaust system insulators separately because this ensures exhaust system support and prevents the use of oil-based oils. You should spray lubricant inside the holes that lead to both the frame hanger and Exhaust Hanger openings on the exhaust system insulator. The service technician should remove exhaust system insulators according to need. In order to replace the exhaust system insulator you must first take off the exhaust Muffler assembly. Apply lubricant to the exhaust system insulator hole which will receive the frame hanger before removing the exhaust system insulator from the hanger. First spray lubricant into the exhaust system insulator holes that will receive the frame hanger before mounting the exhaust system insulator onto its position on the frame hanger. The exhaust Muffler assembly needs to be installed after a new exhaust system insulator. Use lubricant spray on the exhaust system insulator holes before adding the frame hanger and Exhaust Hanger to their positions. This operation continues with the required installation of the exhaust system insulator before the vehicle lowers.

Service and repair operations for the exhaust muffler insulator and hanger and bracket must start by elevating and supporting the automobile. The service procedure for exhaust system insulators needs individual attention for correct exhaust system support and requires avoidance of oil-based lubricants. Apply lubricant spray to the holes of the exhaust system insulator that will receive the frame hanger and exhaust hanger. Remove the exhaust system insulator (1, 2, or 3) together with any required other insulators. The installation process begins by applying lubricant on the exhaust system insulator holes before putting the exhaust system insulator (1, 2, or 3) onto the frame hanger together with any other necessary insulators before lowering the vehicle.

Service and repair operations for the exhaust Muffler insulator and hanger and bracket of the 1500 with rpo l92 start with lifting and supporting the vehicle. Individual service of exhaust system insulators remains mandatory to preserve exhaust system support and oil-based lubricants should be avoided in this process. The driver should apply lubricant through the holes of the exhaust system insulators before sliding in the frame hanger and Exhaust Hanger. The exhaust system requires removal of insulator (1 or 3) yet replacement of insulator (2 or 4) necessitates removal of exhaust Muffler assembly. To remove the exhaust system insulator (2 or 4) from the frame hanger, first apply lubricant on the exhaust system insulator hole which receives the frame hanger. The installation process starts by applying spray lubricant to the exhaust system insulator hole which will receive the frame hanger. Then you should attach the exhaust system insulator (2 or 4) to the frame hanger as required. The replacement of exhaust system insulator (2 or 4) requires the exhaust Muffler assembly to be installed. Apply lubricant to holes on the exhaust system insulator following which install the exhaust system insulator (1 or 3) as needed before lowering the vehicle.

Engineers should start the Exhaust Hanger mounting bracket replacement process for 6.0l, 6.6l, and 8.1l engines by taking off the exhaust manifold pipe and Catalytic Converter first. The hanger bracket bolts which support the Exhaust Pipe need to be removed from vehicles that operate with a 4l60-e transmission system. Car owners should delete the Exhaust Pipe hanger bracket bolts if their vehicle operates using either a 6.0l engine with a 4l80-e automatic transmission or it possesses both a 6.0l or 8.1l engine coupled with a 4l80-e automatic transmission. The installation process for vehicles with a 6.0l engine using 5-speed manual transmission requires you to start by removing first the transmission bolts before proceeding with Exhaust Pipe hanger bracket bolts. Vehicle owners with 6.6l or 8.1l engines alongside an allison transmission or 6-speed manual transmission need to remove Exhaust Pipe hanger bracket bolts. Install the exhaust manifold pipe bracket following its removal process. When the vehicle combines a 6.6l or 8.1l engine with a 6-speed manual transmission, you should attach Exhaust Pipe hanger bracket bolts which must be tightened to 12 nm (106 inch lbs.). The Exhaust Pipe hanger bracket bolts must be installed on 6.6l or 8.1l engines with allison transmission and 6.0l engines with 5-speed manual transmission and tightened to 12 nm (106 inch lbs.). The transmission bolts on 5-speed manual 6.0l engines need to be installed while ensuring a torque of 100 nm (74 ft. Lbs.). You need to install hanger bracket bolts on exhaust pipes between 6.0l or 8.1l engines coupled with 4l80-e automatic transmission systems while bolting them to 12 nm (106 inch lbs.). At each location on the Exhaust Pipe hanger bracket of 6.0l engines with a 4l80-e automatic transmission install the retaining bolts with a torque setting of 12 nm (106 inch lbs.). Install the Exhaust Pipe hanger bracket bolts into vehicles which use 4l60-e automatic transmission then follow up with a torque of 17 nm (13 ft. Lbs.). Reinstall the Catalytic Converter and the exhaust manifold pipe before completion.

You should start your work to replace the Exhaust Hanger mounting bracket for 6.0l, 6.6l, and 8.1l engines by first removing the exhaust manifold pipe and the Catalytic Converter. The Exhaust Pipe hanger bracket bolts should be removed when working on vehicles equipped with 4l60-e automatic transmission. The removal process for 6.0l engine owners with 4l80-e automatic transmission requires them to take out Exhaust Pipe hanger bracket bolts. Vehicle operators should start by separating the transmission bolts and Exhaust Pipe hanger bracket bolts when the vehicle contains a 6.0l engine along with a 5-speed manual transmission. When working on 6.6l or 8.1l engines with either an allison transmission or a 6-speed manual transmission it is necessary to remove the Exhaust Pipe hanger bracket bolts. Reinstall the exhaust manifold pipe bracket once all its removal work is complete. Vehicle owners should install the Exhaust Pipe hanger bracket bolts on vehicles that have 6.6l or 8.1l engines with a 6-speed manual transmission using a torque of 12 nm (106 inch lbs.). When installing the Exhaust Pipe hanger bracket bolts to same specifications on allison transmission vehicles use identical torque values as instructed. To fit and bolt down an Exhaust Pipe hanger bracket at 12 nm (106 inch lbs.) for a 6.0l engine with a 5-speed manual transmission it is necessary to complete the installation by tightening transmission bolts to 100 nm (74 ft. Lbs.). The process for bolt installation requires a torque of 12 nm (106 inch lbs.) for the Exhaust Pipe hanger bracket bolts when using a 6.0l or 8.1l engine with 4l80-e automatic transmission. When installing the Exhaust Pipe hanger bracket bolts to a 6.0l engine with a 4l80-e automatic transmission use a torque of 12 nm (106 inch lbs.). Install the Exhaust Pipe hanger bracket bolts on a 4l60-e automatic transmission while applying torque to 17 nm or 13 ft. Lbs. Attach the exhaust manifold pipe along with its Catalytic Converter.

One must securely lift and stabilize the vehicle before starting any work on a 6.6L engine with RPO YF2 exhaust hanger replacement. First detach the exhaust muffler hanger from the hanger insulator by removing its nuts. The installation begins with inserting the hanger into the hanger insulator where attentive attention must be paid to the Fastener Notice in Service Precautions. Insert the exhaust muffler hanger nuts before installing each component and torquing them to 50 Nm (39 ft. lbs.). Finally, lower the vehicle.

The replacement of Exhaust Hanger mounting bracket for 6.0l, 6.6l, and 8.1l engines requires exhaust manifold pipe and Catalytic Converter removal first. Car owners should discard the hanger bracket bolts which anchor the Exhaust Pipe when the vehicle features a 4l60-e automatic transmission. Vehicle owners with the combination of 6.0l engine and 4l80-e automatic transmission need to take out the bolts securing the Exhaust Pipe hanger bracket. You must first eliminate the transmission bolts then follow with the Exhaust Pipe hanger bracket bolts in vehicles with 6.0l engine and 5-speed manual transmission. The Exhaust Pipe hanger bracket bolts must be taken out when working with 6.6l or 8.1l engines that have either an allison transmission or a 6-speed manual transmission. Yes you can reinstall the exhaust manifold pipe bracket after completion of the removal process. The installation of Exhaust Pipe hanger bracket bolts needs a torque setting of 12 nm (106 inch lbs.) for vehicles with 6.6l or 8.1l engine and 6-speed manual transmission. Place the Exhaust Pipe hanger bracket bolts on engines with an allison transmission and torque them to 12 nm (106 inch lbs.). The Exhaust Pipe hanger bracket bolts require a torque of 12 nm (106 inch lbs.) when installing on a 6.0l engine with 5-speed manual transmission; subsequent step involves tightening transmission bolts to 100 nm (74 ft. Lbs.). The Exhaust Pipe hanger bracket bolts need to be installed on 6.0l or 8.1l engine vehicles with a 4l80-e automatic transmission at 12 nm (106 inch lbs.). A 6.0l engine with a 4l80-e automatic transmission requires mounting the Exhaust Pipe hanger bracket bolts to 12 nm (106 inch lbs.), while a 6.0l engine with a 4l60-e automatic transmission needs bracket bolt tightening of 17 nm (13 ft. Lbs.). Before finishing the repair process attach the Catalytic Converter along with the exhaust manifold pipe.

The first step to replace a mounting bracket requires removing the exhaust manifold pipe only when the engine is 6.0l. Before moving on to remove the left Catalytic Converter you should remove its 6.0l engine counterpart first. The removal process of the Catalytic Converter begins when operating a 6.6l engine. The Exhaust Pipe hanger bracket bolts and bracket must be removed from a vehicle which carries 4l80-e automatic transmission (RPO MT1). The procedure for replacing the Exhaust Pipe hanger bracket bolt/stud and bracket on a vehicle equipped with allison(R) automatic transmission (RPO MW7) includes stud/bolt removal first. The vehicle requires the removal of Exhaust Pipe hanger bracket bolts together with bracket when it is equipped with 6l90-e automatic transmission (RPO MYD). After equipment installation of a 6l90-e automatic transmission (RPO MYD) users must install the Exhaust Pipe hanger bracket and bolts while tightening both hardware pieces to 25 nm (18 lb ft). Affix the hanger bracket for an allison(R) automatic transmission (RPO MW7) along with its bolt/stud and apply 25 nm (18 lb ft) torque. Install the Exhaust Pipe hanger bracket with its bolts during a 4l80-e automatic transmission (RPO MT1) fitment by using torque to 25 nm (18 lb ft). The installation of the Catalytic Converter requires using it on a 6.6l engine. From vehicles equipped with a 6.0l engine, professionals should install the left Catalytic Converter while vehicles carrying a 6.0l engine must have their exhaust manifold pipe installed last.

The first step for Exhaust Hanger mounting bracket replacement on 6.0l and 6.6l engines involves removing the exhaust manifold pipe when using the 6.0l engine and the subsequent removal of the left Catalytic Converter for that engine type. It is necessary to disassemble the Catalytic Converter when working on a 6.6l engine. When working with a vehicle equipped with the 4l80-e automatic transmission (MT1), remove the Exhaust Pipe hanger bracket bolts and bracket; an allison(R) automatic transmission (MW7) requires removing the bolt/stud and bracket while a vehicle with the 6l90-e automatic transmission (MYD) requires removal of associated bolts and bracket. When working with a vehicle featuring the 6l90-e automatic transmission (MYD) install the Exhaust Pipe hanger bracket along with its bolts tightening both to 25 n.m (18 lb ft). The installation of the Exhaust Pipe hanger bracket requires a bolt/stud on an allison(R) automatic transmission (MW7) to be tightened to 25 n.m (18 lb ft). When installing the Exhaust Pipe hanger bracket on a 4l80-e automatic transmission vehicle (MT1) users should securely tighten its bolts to 25 n.m (18 lb ft). Install the Catalytic Converter when the vehicle has a 6.6l engine and perform the left Catalytic Converter installation before the exhaust manifold pipe for the 6.0l engine.

The servicing process for the exhaust muffler insulator, hanger, and bracket of the 1500 model vehicles equipped with LC9/LMG/LY5/L76 (5.3L and 6.0L) requires the vehicle to be properly raised and supported through correct lifting and jacking procedures. Single processing of exhaust hangers remains essential for system support while all lubrication must be oil-free. Apply a soapy solution to both the rod of the frame support bracket and rod of the exhaust pipe hanger before they are removed. First loosen the exhaust pipe hanger by separating it from its connection to the frame support bracket rod as well as the exhaust pipe hanger rod . During installation it is essential to use a soapy solution on the frame support bracket rod together with the exhaust pipe hanger rod and the exhaust pipe hanger inner diameter. Lower the vehicle as you press the exhaust pipe hanger onto both the frame support bracket rod and the exhaust pipe hanger rod.

The maintenance of an exhaust muffler insulator, hanger and bracket requires first lifting and supporting your vehicle. Protective goggles as well as gloves are essential equipment for safety purposes. The service of exhaust system insulators must be done one at a time to preserve exhaust system support while keeping oil-based lubricants out of use. Apply spray lubricant to the exhaust system insulators at the connection points with the frame hangers to improve their removal process. Start by taking out Exhaust Pipe insulators (1 and 2) while keeping the exhaust system in position with an adjustable jack (when replacing exhaust muffler insulators (3 and 4)). Afterwards detach the exhaust system insulators (3 and 4) which are installed on the frame hangers. The hanger area requires lubricant application before placing insulators on it. Begin installation of the Exhaust Pipe insulators (1 and 2) to the frame hangers followed by the exhaust muffler insulators (3 and 4) to the frame hangers and muffler pipe. After this end the adjustable jack stand. An exhaustive check should determine that the exhaust system maintains its correct position and space requirements.

Install it back in place.