Scan Tool Does Not Communicate with E and C Data Line. GMC Truck GMC K Pickup

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Pickup - 4WD 🢒 Body and Accessories 🢒 Data Link Communications 🢒 Scan Tool Does Not Communicate with E and C Data Line

Step	Action	Value(s)	Yes	No
1	Did you perform the Radio/Audio Diagnostic System Check?	--	Go to Step 2	Radio/Audio System Check in Entertainment
2	Turn ignition to the OFF position. Disconnect the scan tool, if connected. Disconnect connector C2 from the Radio. Connect a J 39200 DMM between terminal 15 of the Radio connector C2 and terminal 14 of the Data Link Connector (DLC). Is continuity present?	--	Go to Step 3	Go to Step 4
3	Replace the Radio. Refer to Radio Replacement in Entertainment. Is the repair complete?	--	Radio/Audio System Check in Entertainment	--
4	Locate and repair the open or cause of resistance in CKT 835 (DK GRN) between the Radio and the DLC. Refer to Wiring Repairs in Wiring Systems. Is the repair complete?	--	Radio/Audio System Check in Entertainment	--