 
				
	| 2004 Chevrolet Avalanche 1500 5.3L No communication To all the gm techs i hope you can shed some light on this problem im having. Customer came in wanting to up date the pcm. Truck ran when it came in the shop. Before starting to do the up dates i used the tech 2 to check the state of health on the class 2 data... 
                        
                            FIX posted 7/29/2010
                               
                    iATN Members:  Login to view full TechHelp request Auto Repair Pros: Join iATN to read this TechHelp request Vehicle Owners: Find a nearby iATN member to repair your vehicle 9 Replies Received (View Replies)9 Replies Received (Hide Replies)
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| VIN | 3GNEK12TX4 | 
| Engine | 5.3 L / 8 cyl / GAS | 
| Trans | 4-speed Automatic (Electronic) | 
| Delivery | Fuel Injection | 
| Emissions | OBD-II Compliant | 
| Symptoms | No Communication | 
| Occurs | Always | 
Trouble Codes
| U1000 | Class 2 Communication Malfunction | 
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             Vehicle Data
 Vehicle Data
                2004 Chevrolet Avalanche 1500
| VIN | 3GNEK12TX4 | 
| Engine | 5.3 L / 8 cyl / GAS | 
| Trans | 4-speed Automatic (Electronic) | 
| Delivery | Fuel Injection | 
| Emissions | OBD-II Compliant | 
| Symptoms | No Communication | 
| Occurs | Always | 
Trouble Codes
| U1000 | Class 2 Communication Malfunction | 
 9 Replies Received
9 Replies Received
 9 Replies Received
          9 Replies Received
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