Well My Truck Is Dead Today.....

[supahzen]

Yesterday got home, packed some stuff up for the weekend, loaded it in the truck. Hopped in and went to crank, battery dead. Thought I just left something on, so jumped it off and everything was fine.

 

 

Got somewhere last night after bout an hour driving. All fine, go back out to the truck in about 20 minutes, dead again.

 

Jumped off once more and let it idle and charge for a good bit and left it for the night.

 

 

Got in it this morning same thing, dead as a doornail. Think something is draining the battery.

 

 

Getting towed to the dealership as we speak.

[VMax2007]

I've heard of this, I believe there is a TSB out for it. I believe all they will need to do is re-flash your ECM with updated software.

 

Good luck, keep us posted.

[99silverado1500]

Or battery isnt up to par, my battery was bad and had same symptoms wouldnt recharge. Had to jump it everytime i went somewhere. After I installleda new battery, worked fine. Could be bad battery, or could be covered under a TSB for battery drain.

[topdj]

that darn battery drain protection

I need the reflashed too, I till get it done when I get my alignment on thursday for my truck lift

[Ben]

Either you have something draining the battery or bit by the POS GM positive

post problem on the battery.

 

The sun visor mirror light is a good one to check. El cheapo switches that

many times fall apart and leaves the light on. Famous for draining the batt.

 

Read up on the GM positive post issue at my buddies info/help/HOW2 site

for GM trucks at: #1 Son's info/help/HOW2 for GM trucks

 

There is a lead spacer between the two positive lugs that is a one time use

thing. Once loosened, it has to be replaced, else it will allow the bolt

to poke too far into the battery terminal, which will crack the case. Also

becomes an intermittent connection to over heat and melt the batt case

and ruin alternators, etc.

[supahzen]

Well,

 

Got the truck back.

 

 

They put a new batter in it.

 

 

The service dept. was closed today, but my salesman got the new battery put in and hopefully that will fix the problem.

 

 

I talked to him about the TSB, and he said if anymore trouble occurs with battery drain we wil do the TSB.

 

So hopefully the problem is fixed.

[GMTRUCKTECH]

you need to get the reprogram done as soon as possible

[redvett]

I agree with GMTRUCKTECH the battery is only a band-aid get the cal update. GM didn't make it available for fun. You have a warranty use it. Warranty = problem tracking. If you don't get it fixed under warranty GM assumes there is no problem.

[atboley]

there is a recall on it to, for reprogramming the bcm...

[VMax2007]

there is a recall on it to, for reprogramming the bcm...

 

It is not a recall, it's a TSB, big difference. And the NBS trucks do not have a bcm, it is now part of the new E38 ECM.

[MS3DALE]

Heres a bulletin I found on this.....

 

 

Document ID# 2009971

2007 Chevrolet Silverado - 4WD

 

 

Subject: Intermittent Low Battery Voltage, Engine Will Not Crank, Cranks But Will Not Start, Charging System Light On, Service Battery Charging System Message DIsplayed, DTC B1405, B1516 Set (Reprogram BCM) #06-06-03-013B - (09/11/2007)

 

 

 

Models: 2007 Cadillac Escalade Models

 

2007 Chevrolet Avalanche, Silverado, Suburban, Tahoe

 

2007 GMC Sierra, Yukon Models

 

1500 and 2500 Series Vehicles Only

 

 

Condition

Some customers may comment of one or more of the following conditions:

 

• Charging system light on

 

• Service battery charging system message displayed

 

• Intermittent low battery voltage

 

• Vehicle will not crank

 

• Vehicle cranks but will not start

 

• Diagnostic Trouble Codes (DTCs) B1405 and/or B1516 may be set

 

Cause

This condition may be caused by Body Control Module (BCM) calibrations that create a lower battery state of charge than intended in low electrical power usage modes.

 

Correction:

Do This:

Reprogram the BCM.

 

Don't do this:

Do NOT replace the BCM or battery current sensor.

 

 

A revised calibration has been developed to address these conditions. Technicians are to reprogram the BCM using SPS with the latest software available on TIS2WEB. Refer to the Body Control Module Programming and Setup procedure in SI (Document ID# 1741198). As always make sure your Tech 2® is updated with the latest software version.

 

Additional Diagnostic Tips

Usually if a vehicle will start and then not start in a very short period of time, the condition may be created by a loose or corroded connection. In most situations a battery in a good state of health cannot be drained within minutes without a major and most likely very obvious short. The following items are also possible areas of starting and charging system concerns and should be considered as a part of your diagnosis. For more information refer to the Symptoms -- Engine Electrical diagnostic procedure in SI (Document ID# 1703276).

 

Verify the battery cable connections. It is possible for the negative or positive terminal connector nut to tighten without making a good electrical connection on the battery terminal. The top of the negative battery post should be slightly above the top of the cable clamp.

Verify the battery condition and state of charge using the Midtronics tester and a VAT40 or equivalent tester. Refer to the following diagnostic procedures in SI for additional information.

• Battery Common Causes of Malfunction (Document ID# 1703244)

 

• Battery Inspection/Test (Document (ID# 1703241)

 

• Battery Charging (Document ID# 1703243)

 

Verify proper operation of the charging system. Refer to the Charging System Test procedure in SI (Document ID# 1703783).

Verify that the vehicle does not have a parasitic battery drain. Refer to the Battery Electrical Drain/Parasitic Load Test procedure in SI (Document ID# 1741191).

Verify that the front and/or rear Heating, Ventilation and Air Conditioning (HVAC) blower motor turns off with the key in the OFF position. If the blower motor stays on, refer to the Blower Motor Always On diagnostic procedure in SI (Document ID# 1701247).

Ask the customer if they use the accessories (Radio, DVD player, etc.) with the key in the ON position but with the engine off. This may contribute to a low battery state of charge and difficulty cranking the engine. If the customer uses their accessories with the engine off ask them to turn the key to the ACC position instead of the ON position.

If the vehicle is equipped with aftermarket accessories, verify that they are not a source of concern. Remove or disable if necessary and retest the vehicle. Refer to the Checking Aftermarket Accessories procedure in SI (Document ID# 816776).

Verify that there are no loose connections at the 175 amp mega fuse.

Verify that the Retained Accessory Power (RAP) system is operating properly. The radio and accessories should shut off once the key is removed from the ignition and the driver's door is opened. For more information refer to the Retained Accessory Power (RAP) Malfunction procedure in SI (Document ID# 1776533).

Refer to the following Bulletins and PIs for additional areas of concern.

• A fuel pump relay sticking concern. Refer to Corporate Bulletin number 06-06-03-011B.

 

• An ignition switch concern and a loss of GM LAN data due to an unwanted ground. Refer to Corporate Bulletin 06-08-45-010.

 

• A rear door lock relay sticking concern. Refer to Preliminary Information bulletin PIT3984 (Document ID# 1820437).

 

Check circuit 1240 (Red/White wire) for a short to ground in the driver side or circuit 1340 (Red/White wire) passenger side "B" pillar area near the seat belt retractor. See Document ID# 1740425 for a copy of the wiring diagram for circuit 1240 that goes to the driver side and circuit 1340 that goes to the passenger side windows.

Caution: Circuit 1240 is protected by a 25 amp circuit breaker (LT DRS) and may be hot to the touch if the circuit is shorted to ground.

 

Circuit 1340 is protected by a 25 amp circuit breaker (RT Doors) and may be hot to the touch if the circuit is shorted to ground.

 

 

Warranty Information

For vehicles repaired under warranty, use:

 

Labor Operation

Description

Labor Time

 

N4808*

Body Control Module Reprogramming with SPS

0.4 hr

 

Add

Diagnosis Time

0.0-0.3 hr

 

*This labor operation number is for bulletin use only. This number will not be published in the Labor Time Guide.

 

 

 

 

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

 

 

© Copyright General Motors Corporation. All Rights Reserved.

 

Document ID# 2009971

2007 Chevrolet Silverado - 4WD

[GMTRUCKTECH]

there is a recall on it to, for reprogramming the bcm...

 

It is not a recall, it's a TSB, big difference. And the NBS trucks do not have a bcm, it is now part of the new E38 ECM.

 

 

 

You are giving out bad info! NBS have BCM

 

Body Control Module Replacement

 

Callout

 

Component Name

 

 

Preliminary Procedure

Remove the knee bolster. Refer to Knee Bolster Replacement

 

1

 

Body Control Module

 

 

 

Tip

1. <LI type=1>Remove the BCM cover. <LI type=1>Disconnect the electrical connectors. <LI type=1>Press on the tabs to release the body control module.

    

2. If a replacement module is installed, program the module. Refer to Control Module References .

    

 

[VMax2007]

Hmmmm, I thought I read somewhere that the new E38 ECMs had the BCM integrated into it. Maybe I am thinking of a different control module? Or I just got some bad info, sorry.