Subject:  	(Inspect Ground Bolts) Multiple Electrical Issues Including Stall / Crank No Start / Lighting Issues / Memory And Power Seats / Power Windows Inoperative / Heated Cooled Seats / Trailering / ABS MIL / Stability Message 		

Brand:	Model:	Model Year:	VIN:	Engine:	Transmission:	
		from	to	from	to			
Chevrolet	Silverado	2017	Oct 18, 2016*	Oct 21, 2016*	All	All	
GMC	Sierra	2017	Oct 18, 2016*	Oct 21, 2016*	All	All	
* Built at Ft. Wayne Assembly Plant (11th VIN Position "Z")
 
Involved Region or Country	North America 	
Condition	On a very small population of vehicles, some body and chassis ground bolts may not have the proper induction hardening completed.  A ground bolt without the proper hardening may not properly clamp/secure the ground eyelet, causing a poor ground connection.  The following body and chassis ground locations could be affected: 
•	G101
•	 G102
•	G121
•	G141
•	G311
•	G312
•	G380
•	G400
•	Fuel Filler Neck Ground Strap
Depending on which ground location is affected, customers and technicians may notice different symptoms/DTC's.  Below is a list of the common symptoms and DTC's that may set for each affected ground location.   
Note: Depending on the vehicle's options (RPO's) the symptoms and DTC's may vary.  Also, depending on the grounds load, (how many components are operated) this may also cause the symptoms/DTC's to occur.  Example, If G101 has a poor ground connection, each component on that ground may work properly if cycled on one at a time.  If multiple components are cycled on all at the same time, such as the left turn signal, park lights, headlights, horn, etc., the symptoms/DTC's may begin to occur.  
•	- G101
Windshield washer fluid level low message
Left front turn signal malfunction message
Left headlight inoperative
High beam headlights inoperative
Left mirror turn signal indicator stays on 
Left front turn signal inoperative
Left front park lamp and/or daytime running lamps blinking/flickers
Left rear turn signal flashing fast
Horn inoperative
BCM DTC's: B2575, B3948
- G102
Right front turn signal malfunction message 
Right headlight inoperative
High beam headlights inoperative
Right mirror turn signal indicator stays on
Right front turn signal inoperative
Right front park lamp and/or daytime running lamps blinking/flickers
Right rear turn signal flashing fast
ECM DTC: U1510
BCM DTC: B2699, B3949
•	- G121
Service Stabilitrak Message
ABS lamp on
No Communication with the EBCM
Engine stall
Crank no start
Reverse lights inoperative
ECM: P12A6
TCM: U0121
BCM: U0121
Aux Chassis Control Module: U0121, U415
Power Steering Control Module: U1833, U0415, U0121
Park Assist Module: U0422
Front View Camera: U0121, U0100, B1011
•	- G141
This is the main chassis ground from the battery.  Any of the symptoms listed for chassis ground locations G101, G102, G121, and G400 could by caused by a poor connection at this ground. 
•	- G311
Driver's Power Seat inoperative
Left Power Windows inoperative
Left Power Folding Mirror inoperative
Memory Seat functions inoperative
Left Heated and/or cooled seat inoperative
Memory Seat Module: B2355, B2365, B2375, B1825, U0140, U0155
BCM: U1534, U1538, U1548
IPC: U0140, U0151, U0159, U026A
Serial Data Gateway Module: U0078
SDM: U0140
PPS Module: U0140, U0155, U0151
Radio: U0140, U0164
VCIM: U140, U0151
Park Assist Module: U0186, U0140, U0155, U0184
Front Camera: U0140, U0151, U0198, U0184, U0155, U0208, B1011
•	- G312
Passenger Power Seat inoperative
Right power windows inoperative
Right Power Folding mirror inoperative
Right heated and/or cooled seat inoperative
Bench seat APO/power outlet inoperative
BCM: U1524
•	- G380
Rear window defogger inoperative
•	- G400
Service Trailer Brake Message
Trailer lighting inoperative
Trailer brakes inoperative
Left Rear Turn signal failure message
No communication with the Aux Chassis Control Module
Left turn signal fast flashing
License Plate lights inoperative
Reverse lights on dim
When in Reverse, left reverse light is inoperative
Cargo lights inoperative
Aux Chassis Control Module:- P0562, C1113, C111B
EBCM: U0137
BCM: B3883
•	-  Fuel Filler Neck Ground Strap
None	
Cause	Poor ground connection(s) caused by ground bolts not achieving a proper clamp load.  	
Correction
Determine the suspect ground by the symptoms/DTC's listed above and inspect the ground by grasping the ground wire(s), near the eyelet, and carefully verify the eyelet does not rotate or is not loose. 
•	 If no issue is found, then torque the ground bolt to 80 lb in (9 Nm).  
•	If the ground eyelet rotates or is loose on the ground bolt, replace the ground bolt with GM P/N 11588337 and torque to 80 lb in (9 Nm).  While the ground bolt is removed, inspect the ground eyelet for any signs of arcing and repair as necessary. 
If the applicable ground connection has been verified and the concern remains, please follow normal SI diagnostics for your symptoms/DTC's. 
Parts Information
Description	Part Number	Qty	
Bolt	11588337	As needed