GMC ENVOY TRANSFER CASE

I Am Having A Problem With My 4wd. I Have Noticed That The Service 4wd Light Comes On While I Am Driving. Now Whenever I Start The Vehicle...

The Service 4x4 Light Comes On. The Transmission Shop Told Me That Every Time They Clear The Code It Comes Right Back On. What Could Be...

Tranny Only Stays In 2 Wheel High When Selecter Is Turned To Any Position Nothing Happens. Also Light On Selecter Not Working

I Have A Envoy 2002. The 4x4 Does Not Engage And The Indicator Light Is Not Coming On As Before. Tried Fuses But No Luck

My 2002 Gmc Envoy Has No 4wd Or No Switch Lights Could It Be A Fuse Or The Switch Itself. Or S/thing Else?

I Have A 2002 Gmc Envoy Sle And The 4x4 Seems To Be Running Slowly, Like Its Beginning To Seize Up, And Then After I Stop I Can Smell...

I Would Like To Know What To Look For, Because The Four Wheel Drive Will Not Kick In. All 4x4 On Sector Switch No Working When Trying To...