mine only does this everyonce and a while. I kinda blow through the gears on the highway and its good fer a weekish. lol

 

Anybody find a cure for the above or this below I copied from an old post of mine. Mine has done it since new, the Stage kit didn't fix it and neither did a throttle body clean. Any ideas??

#2. When the engine is heat soaked, like when waiting in drive thru line, or coming out of the store, when you first take off, on the first shift the rpm does not drop off when you let off the gas and press the clutch in. It is like the throttle is stuck for a few seconds before it drops. Pain in the butt, and makes you look like a novice driver. I have had it to the dealer 5 times with no fix. Gave up, but been driving it the last few days and remembered how it is. (wifes car). Anyone hear of a fix for this?

 

Has anyone had their sunroof not sit flush with the roof? Mine sets low in the rear. Doesn't leak or make noise. Can this be adjusted to sit flush with the roof? Should i be concerned? 2010 SS with 23k on it.

 

Hey robinbraves,

Have you reached out to your dealership regarding this concern? If you would like me to set something up, PM me your full name and contact information, VIN, current mileage, and preferred dealership. I'd be happy to make sure this concern is addressed.

Sincerely,

Jonathan A.
Chevrolet Customer Care

 

right now for me looks like the pc under the steering wheel area that communicates w the whole system
cant wait to see how much that costs to replace

 

No i have not contacted the dealer yet. I plan to soon. With 24k on the car and a 2010
mdl would it be covered under wnty you think. I'm not the original owner.
.

 

u0073
SO tired of this code

 

Hey robinbraves,

I would be happy to see if your vehicle has any applicable warranties left if you would like to private message me your VIN. Also if you would like any assistance setting up an appointment with your dealer I would also be happy to assist.

I look forward to your reply via private message,

Jonathan A.
Chevrolet Customer Care

 

do any service people know anything about u0073 code
no one here seems to know anything

 

U0073 - Definition: Control Module Communication Bus "A" Off
U0140 - Definition: Lost Communication With Body Control Module

What needs to happen is the cluster can be commanded to sweep gages using the GM Tech 2 scan tool. Keep in mind that the gage testing and any programming needs to be done at a GM dealer using the GM Tech 2 scan tool. If they respond correctly to that command that means the gages and wiring to the gages is fine and the part(s) responsible for sending info to the gage is inaccurate. If they don't sweep ok then suspect a faulty cluster. To do the sweep test it needs to go to a GM dealer though. The gages not being accurate is common on the older year trucks and a cluster is the fix (along with programming the new cluster using GM software).

Check this information about #PIT4730: Additional Diagnostic Information For U0140 Or U0073 - keywords BCM comm communication cycle DIC door freeze gage gauge inop inoperative int intermittent LAN locks message no service speed speedo - (Oct 3, 2008)

Subject: Additional diagnostic information for U0140 or U0073

Models: 2008-2009 Buick Enclave
2006-2009 Buick Lucerne
2006-2009 Cadillac DTS
2007-2009 Cadillac SRX
2008-2009 Cadillac CTS
2007-2009 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2006-2009 Chevy Impala
2006-2007 Chevy Monte Carlo
2008-2009 Chevy Savana
2007-2009 GMC Acadia, Sierra, Sierra Denali, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL
2008-2009 Hummer H2
2008-2009 Pontiac G8
2007-2009 Pontiac Torrent
2007-2009 Saturn Outlook, Vue

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern: Some customers may complain of one of the following symptoms:
• Door locks cycle while driving
• Intermittent No Start
• Service Stabilitrak DIC message
• Speedometer and tachometer freeze while driving

Along with these complaints DTC U0140 00 and/or U0073 71 may be stored as a history code in any GM LAN High Speed module.

If the data circuits (2500 & 2501) have experienced an "intermittent" short to ground or short to each other "2 times" within a period of less than 1 second and then go back to normal, the BCM may appear to be "off-line" on the high speed buss. This intermittent scenario should not cause other modules to lose communication, only the BCM. If this situation happens, the BCM will not start communicating with other modules again until the key is out of the ignition and the BCM has timed out (approximately 20 minutes).

Typically the customers complaint will be intermittent and usually occur when driving over bumps/rough roads.

Recommendation/Instructions:
If DTC U0140 00 or U0073 71 is set only as a HISTORY code in any of the high speed modules, refer to "Testing for Electrical Intermittents" in the service manual to reset the DTC and diagnose the location of the fault.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

Bulletin:
TSB Number: 08-07-30-021 NHTSA Number: 10025402 TSB Date: April 1, 2008 Date Added to File: August 6, 2008
Failing Component: Engine And Engine Cooling:Engine
Summary: Loss of high speed gmlan communications, intermittent no crank, ipc gauge fluctuation, intermittent door lock cycling, transmission may not shift, DTCs U0073, U0100, U0101, U0102, U0140 (repair backed out terminal in transmission harness connections).