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Questions & Answers
While changing the battery there was a spark on the positive pole. The starter moves but the engine does turn on
In the dash board I get the lock symbol . Could it be a fuse ?
The security, antitheft or lock picture/icon is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. This link explains it pretty well.
on Dec 30, 2015
Have a u1041 loose of ebcm ebtcm communication code on 2001 cherolet tahoe
A U1041 code means that communications with the electronic brake control module are lost, and this may have happened because:
• Electronic Brake Control Module harness is open or shorted
• Faulty Electronic Brake Control Module (EBCM)
• Electronic Brake Control Module circuit poor electrical connection
To fix the issue, inspect the issues mentioned above and check that all the wirings and connectors are intact-nothing should be broken or corroded.
on May 21, 2020
My 05 tahoe w/o t go over 30 to 35mph ot revs fine until it hits 30 then slows down
If the engine stops revving at a certain RPM, it's probably a safety feature and you need to replace a sensor.
On some cars, if a crankshaft or camshaft position sensor fails, the computer will guesstimate when to fire the spark plugs using information from the sensor that DIDN'T fail. But to protect the engine, the computer will only allow it to rev to a certain speed.
The most common culprit is the crank position sensor -- try replacing that first. Probably pretty cheap online.
on Jul 07, 2019
How to fix my 2001 Chevy Tahoe tow/haul keeps coming on when not pushed. If I leave it unattended will it cause my transmission problems cause I just had to replace it
Tow/haul mode enables the operator to achieve enhanced shift performance when towing or hauling a load. When tow/haul mode is selected, the tow/haul switch input signal to the body control module (BCM) is momentarily toggled to zero volts. This signals the powertrain control module (PCM) to extend the length of time between upshifts and increase transmission line pressure. Cycling the tow/haul switch again disables tow/haul mode and returns the transmission to a normal shift pattern.
Would't trust it , take an have DTC'S - diagnostic trouble codes checked by a qualified repair shop with a factory or professional scan tool . Auto part stores can not check BCM code's .
Tow/Haul Switch/Indicator Always On or Inoperative
Install a Scan Tool .
Turn ON the ignition, with the engine OFF.
Cycle the tow/haul switch while observing Tow/Haul Mode on the Scan Tool .
Does the Scan Tool display Active when the switch is first pressed, and then Inactive when the switch is pressed again?
Go to Intermittent Conditions in Engine Controls - 4.3 L or Intermittent Conditions in Engine Controls - 4.8 L, 5.3 L and 6.0 L
Go to Step 2
on Mar 19, 2019
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