Question 1

How to replace the exhaust muffler on LLV or LLR engines (2.9L, 3.7L) on Chevrolet Colorado?

Accepted Answer

To replace the exhaust Muffler on the items with llv or llr engines (2.9L, 3.7L), first lift the vehicle and support it, being careful to not extend too much the rear brake hose. Remove low left & right shock absorber nuts and bolts, low rear leaf spring nut and bolt, and winter edge of block of wood between the frame and rear axle. Make sure not to over-flex or damage the flex joint in this process. Second, take off the nuts that hold the Muffler to the Catalytic Converter, without using oil lubricants. Squirt some soapy water on the exhaust pipe hanger rods to make it easy to take the exhaust hangers out and pry out the hangers. To remove the Muffler slide it rearward from Catalytic Converter, rotate it 90 degrees counterclockwise and pull it out of the vehicle carefully. For installation, with Muffler turned 90 counterclockwise slip it over the rear axle until the flange is close to catalytic convertor, then turn it clockwise 90 as for install position and slide it forward, align the studs at the rear of catalytic convertor. Again, avoid oil-based lubricants. Using a soapy solution facilitate the installation by wiping it on the inner diameter of the exhaust pipe hanger and the exhaust pipe hanger rod then pressing them on to the rods. Tool the nuts holding the Muffler to the Catalytic Converter in hand until they touch the metal flange, which is to be tightened to 45 nm (33 lb ft). Remove the block of wood, install the nut on the bolt in the right rear leaf spring and tighten 85 nm 63 lb ft. Finally install and tighten the lower shock absorber bolts and nuts to 95 nm (70 Lb ft). Lastly, check the exhaust system for leaks and underbody touch before lowering down the vehicle.

Question 2

How to replace the muffler on a Sedan LS, LT, or Maxx LT on Chevrolet Malibu?

Accepted Answer

To replace the Muffler on sedan ls or lt & maxx lt, first lift up and support the vehicle in the appropriate way. For 2.2 models, take off the intermediate pipe to Muffler nuts while for 3.5l, take off the rear Catalytic Converter to Muffler nuts. With the help of another person, remove the Muffler insulators from the hangers, but remove the Muffler assembly afterwards. For installation, place the hanger on the new Muffler assembly and help in installing the Muffler insulators. If the vehicle has a 3.5l engine, attach the rear Catalytic Converter to Muffler nuts and tighten it to 30 n.m (22 lb ft). For the 2.2l engine-. Intermediate pipe to Muffler nuts as well tighten the nuts by 30 n.m (22 lb ft) before lowering the vehicle.

Question 3

How to replace the exhaust muffler on those equipped with LC9, LMG, LY5, or L76 engines on Chevrolet Tahoe?

Accepted Answer

In order to install a new exhaust Muffler on those vehicles that are equipped with lc9, lmg, ly5, or l76 engines, start by lifting and supporting the given vehicle. Unplug the chassis wiring harness electrical from the right rear wheel speed sensor wiring harness electrical , and if necessary the chassis wiring harness electrical from the right rear Shock Absorber and the right rear air line from the Shock Absorber. Pull off the right rear wheel speed sensor wiring harness connector from the frame without prying the rear suspension sensor link rod from rear position sensor ball stud. Denothe right rear automatic level control sensor link rod from the sensor by assisting the sensor lever twisting the rod ball dis-ajoining from the ball stud. Place a suitable adjustable jack under the rear axle. Then, remove the correct suspension bolt and attach it to the right axle's mounting point. Remove the designated area around the rear opening using the appropriate tool. Also, remove the rear cover, and if necessary, remove the inner components from the rear opening. Take off the right rear stabilizer shaft link to frame bolt and nut, right rear stabilizer shaft link, right rear Shock Absorber lower bolt and nut. Lower the right side of the rear axle to take out the Muffler loosening the Catalytic Converter to Muffler clamp bolt and lubricating the insulators so that it become eady to pull them off. Even with help, you should be able to get all the insulators down from the hangers on the exhaust system (1, 2, and 3), as well as the insulator near the resonator without overstretching the flex coupler. Prolonged use causes the Muffler assembly to become loose, you need to remove the assembly, and afterwards lubricate the insulators for the installation. With the help of another person, bolt the Muffler assembly and the insulators to the exhaust system hangers (1, 2, and 3), and close to the resonator. Mount the Muffler assembly to the three-way Catalytic Converter and tighten the clamp bolt using 44 nm (32 lb ft) of torque. Lift the rear axle into position using the adjustable jack, apply the nut and lower bolt to the left rear shock, and tighten as you place all nut and bolt to 95 nm (70 lb ft). Mount the right rear stabilizer shaft link bolt to the frame and right rear stabilizer shaft link nut, connecting to 65 nm (48 lb ft). Mount the right rear axle tie rod bolt and nut and the rear axle vent hose if it is needed and the vent hose swivel clip if needed. Insert the right rear link rod to the ball studs on the sensors using the hose clamp pliers (J 38185), in making sure that the rear axle wiring harness clip is installed properly. Lastly, secure the right rear wheel speed sensor wiring harness clips to the frame and the Control Arm Bracket, secure the right rear wheel speed sensor wiring harness electrical connector clip to the frame, and if so required, secure the right rear air line to the Shock Absorber and to the chassis wiring harness electrical connector to the right rear Shock Absorber. Tie in the chassis wiring harness electrical connector with the right rear wheel speed sensor wiring harness electrical connector and then lower the vehicle.

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