GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.
Just so I can be sure on what engine this has, can you post the engine liter size of this model here for me?
Let me know so we can continue, thanks Pete.
O.k.,the rear engine cover or dog house does need removed to access this sensor.If you in fact do have a 4.8 liter engine then the sensor is installed at the very rear of the block as shown below.There will be 4 bolts or nuts or straps that need released to release the dog house and possibly a center console compartment as well which will be held in with nuts and bolts to then remove the dog house to access and replace this sensor.
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