2007 Chevy Avalanche Stabilitrak shutting itself off

DISTANCE09

MEMBER
2007 CHEVROLET AVALANCHE
V8
4WD
AUTOMATIC
43,700 MILES

The Avalanche transfer case has 2WD, Auto, 4WD High, and 4 WD Low. The vehichle can theoretically be operated safely on dry pavement in either 2WD or Auto. Auto senses when 4WD is required. The other night the message flashed that stabilitrak was off. The vehicle had been operating in AUTO without any problem for much of its life. When the message flashed it shifted to 4WD High. It would not go back into Auto so I put it in 2WD. Turned Stabilitrak back on and it would not go back in Auto. Next day tried to reset and same problem. On the way to have the tank filled the next day, the process repeated itself and the Check Engine Light came on. Not sure if the two are related or if this is coincidence. Stopped and filled it up and when I went to start the engine it just cranked which has never happened before. Turned off AC and it started. Dropped at dealer. Dealer indicated that codes pointed to a bad fuel pump. Not sure why that would affect the stabilitrak. Dealer is telling me to ignore the message and drive in 2WD and not to drive on dry pavement in AUTO. Nowhere in the manual does it say that. Nothing I have read anywhere indicates that is a problem other than to affect fuel economy. Sales guy said it was not a problem (I know, sales guys say anything). Could this just be a faulty or corroded sensor or have you heard of other similar problems? Could it be tied to the fuel pump and the entire fuel system and related sensors? Thanks

9 Replies

MERLIN2021

MECHANIC
17,250 POSTS

This Chevy tech bulliten amy be worth looking into in your case. Especially because of the "no Crank" problem and the engine light...
Various Electrical Concerns - Intermittently Functioning or Inoperative Component, IP Warning Light On, DIC Message Displayed, DTC Set, No Crank/Start (Repair IP Wiring Harness) TECHNICAL SERVICE BULLETIN Reference Number(s): 07-08-49-018, � Date of Issue: � September 07, 2007 Related Ref Number(s): 07-08-49-018 ARTICLE BEGINNING CONDITION Some customers may comment on one of the following driver notifications and/or effects:
Affected Model(s): 2007-2008 Cadillac Escalade, Escalade ESV, Escalade EXT; 2007-2008 Chevrolet Avalanche, Silverado, Suburban, Tahoe; 2007-2008 GMC Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL

Not all of the effects or driver notifications listed above have been experienced. However, thedifferent effects and driver notifications may be caused by one of the wires in the IP harness being chafed or cut. Components on different lines in the list above are in different circuits. Due to the cause of the condition, and the positions of the wires in the IP harness, it is unlikely that more than one circuit will be affected by the condition. Upon investigation, the technician may find several DTCs set as current or in history. The technician may also find one or more blown fuses in the IP and underhood fuse blocks. The potential fuses are listed below: � � � 60 amp MBEC1 (#72) (Underhood) � � � 30 amp AMP (#40) (Underhood) � � � 15 amp RDO (#41) (Underhood) � � � 10 amp IPC (#46) (Underhood) � � � 15 amp AIRBAG BATT (#51) (Underhood) � � � 10 amp DSM (Left side of IP) CAUSE The condition may be caused by one of the wires in the IP harness being chafed or cut on the parking brake pedal assembly. Five areas of potential contact have been identified and are shown below: Fig. 1: View Of IP Wiring Branch Courtesy of GENERAL MOTORS CORP. � � � The IP wiring branch to C202 (IP to body cam lock connection) may have been routed outboard of the junction block (left IP) and the retaining clip (1) off the branch may not have been seated. Possible point of contact (2). Fig. 2: Locating Points Of Contact Courtesy of GENERAL MOTORS CORP. � � � The IP wiring branch to C202 may have been pushed up and forward into the park brake assembly and the retaining clip off the branch may not have been seated. Possible points of contact (1, 2). Fig. 3: View Of Gray Retaining Clip Courtesy of GENERAL MOTORS CORP. � � � The IP wiring branch to C202 may have never been secured into place (gray retaining clip (1) off the branch was never seated). Fig. 4: View Of Top Rear Edge Of Park Brake Assembly Courtesy of GENERAL MOTORS CORP. � � � The IP harness may be in hard contact with the top rear edge (1) of the park brake assembly. Fig. 5: View Of End Of Park Brake Release Cable Courtesy of GENERAL MOTORS CORP.� � � When releasing the park brake pedal with the park brake release lever/handle, the moving part (1) at the end of the park brake release cable may be coming into hard contact with the IP harness. CORRECTION If the symptoms match those listed above, or if a condition is found with one of the circuits running to C1 or C2 of the junction block or to the inline IP-to-body connector (C202), then remove the front driver side door sill plate, driver side body hinge pillar trim panel, left IP outer trim cover and perform the following steps: 1. Visually inspect the IP harness for damage at the park brake pedal assembly (refer to potential damage points in photos - at the side and rear of the park brake assembly). Note that damage may be hidden from view (turned away from you, or covered by electrical tape). 2. Operate the park brake release lever. Is the moving part at the end of the park brake release cable coming into contact and damaging the IP harness? Inspect the IP harness at this point. Note that the damage may be hidden from view (by electrical tape). 3. If damage is found, repair the wiring. Fig. 6: View Of IP Branch Routing Courtesy of GENERAL MOTORS CORP. 4. Inspect how the IP branch to C202 is routed. Reroute the wiring as necessary to match the correct routing in the photo above. In order to route the IP harness branch correctly (behind the junction block-left I/P): Remove the cover from the junction block-left I/P, unseat the junction block from the bracket. Disconnect C202. Route the harness such that it lays between the "goalposts" of the junction block bracket. Seat the junction block to the bracket (harness will now be under the junction block). Secure the harness by seating the grey offset retaining clip to the dashmat (or brown "buddy clip" if present - usually on SUV's only). Reconnect C202. 5. Make sure that the grey offset retaining clip (off of the IP branch going to C202) is seated into the hole in the dashmat or into the brown buddy clip (if present), securing the IP branch to the vehicle. 6. If the harness is still in contact with a sharp edge or point of the park brake assembly, protect the harness by routing it away from the contact point and holding it there with tie straps, and/or covering the sharp edge with butyl tape. WARRANTY INFORMATION For vehicles repaired under warranty, use: