Chevrolet Colorado Questions - I have a 2007 Colorado four I have a 2007 Colorado four wheel drive. Recently the push buttons wont go into 4wd. Any suggestions?? 4wd is used very rarely. 2 Answers. I have a 2007 Colorado 4wd; standard shift transmission. Lately the four wheel drive will not engage. Four wheel drive is Chevy Colorado 4x4 Issues - YouTube Jan 28, 2014How To Override Stuck 4WD On A GMC Vehicle, Transfer Case Control Module Remove and Replace - Duration: 10:55. JamieJones TheCarMan 697,991 views Wiring diagram for 4wd actuator | TTORA Forum Feb 19, 2006Here's the wiring diagram. As you can see by tracing through the circuit, it is in 2WD in this diagram, the limit switch has it stopped, and it will do nothing. When the switch is turned on (4WD position), the indicator will light showing that the 4WD is on, and relay one will activate.