Anyone know what this plug goes to?

Chance Neel · August 31, 2017

Make sure its not in AUTO or 4WD. Also you could have messed up an ABS sensor or something when the tire blew.

yea when I bought it I was told to leave it in 2wd and it always stays there.

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Chance Neel · August 31, 2017

What size tires and wheels do you have on there currently?

Did you install the spare 17" on one of the rear wheels?

If you have oversized tires, then one wheel could be spinning faster than the other.

its all factory. It was the front left that blew and it was replaced with the factory spare that's the same size. For all I know it could be the tranny having issues which would still feel like it's up front. I've already called roadside to show up and tie it to the nearest dealership so I guess we will see. Contacted my insurance agent too just in case. [emoji20]

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Justin101714 · August 31, 2017

Tire monitor system sensors read through the Remote Control Door Lock Receiver (RCDLR). Basically functions like a constant door key fob. The BCM is also involved as it gets the info from the RCDLR on the tire pressures, and the BCM relays it to the instrument cluster to give you the pressure readouts, warning lights, etc.

No more RCDLR's. The BCM does all these functions now.

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newdude · August 31, 2017

No more RCDLR's. The BCM does all these functions now.

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So the schematics and the system description and operation right from GM for a 2017 Sierra are lying to me...right...

The tire pressure monitor system warns the driver when a significant loss of tire pressure occurs in any of the 4 tires and allows the driver to display the individual tire pressures and their locations on the driver information center.

The system uses the body control module (BCM), driver information center, instrument cluster, remote control door lock receiver (RCDLR), and a radio frequency (RF) transmitting pressure sensor in each wheel/tire assembly, and the serial data circuit to perform the system functions. Each sensor has an internal power supply with an approximate 10 year service life.

When the vehicle is stationary, the sensor's internal accelerometer is inactive, which puts the sensors into a Stationary state. In this state the sensors sample tire pressure once every 30 seconds and do not transmit at all if the tire pressure does not change. As vehicle speed increases, centrifugal force activates the sensors internal accelerometer causing the sensors to go into Wake and then Drive mode. In Drive mode, the sensors sample tire pressure once every 30 seconds and transmit in Drive mode once every 60 seconds. The RCDLR receives and translates the data contained in each sensors RF transmission into sensor presence, sensor mode, and tire pressure and passes it to the BCM. In turn, the BCM sends the tire pressure and tire location data to the driver information center via the serial data circuit where they are displayed.

The sensors continuously compare their last pressure sample to their current pressure sample and will transmit in Learn Mode-Pressure Triggered if a 8.3 kPa (1.2 psi) change in tire pressure has been detected in either a Stationary or Drive state. When the tire pressure monitor system detects a significant loss of tire pressure, the tire pressure monitor indicator icon is illuminated on the instrument cluster and if equipped, a tire pressure low, add air to tire type message is displayed on the driver information center. Both the indicator icon and driver information center message can be cleared by adjusting the tire pressures to the recommended pressures and driving the vehicle above 40 km/h (25 mph) for at least 2 minutes.

If power is disconnected from the BCM or if the vehicle battery is disconnected, each tire pressure monitor sensor ID is retained but all of the tire pressure information is lost. Under these circumstances the BCM cannot assume that the tire pressures were maintained over an unknown period of time. If equipped, the driver information center will display all dashes and the scan tool will indicate a default tire pressure value of 1020 kPa (148 psi) for each tire. Driving the vehicle above 40 km/h (25 mph) for at least 2 minutes will activate the sensors causing the driver information center to display the current tire pressures. The EL-46079/J-46079 tire pressure monitor diagnostic tool, EL-50448 tire pressure monitor sensor activation tool, or equivalent may also be used to activate the sensors as well.

The BCM has the ability to detect malfunctions within the tire pressure monitor system. In the event a DTC is set, the tire pressure monitor indicator icon on the instrument cluster, if equipped will flash for 1 minute and then remain illuminated after the ignition is turned ON and the instrument cluster bulb check has been completed. Any malfunction detected will cause the driver information center to display a service tire monitor system type message. For more information on other functions of the BCM, refer to Keyless Entry System Description and Operation.

Justin101714 · September 1, 2017

Dang, I stand corrected, there's vehicles that no longer use the RCDLR, just figured all the models have caught up now, but the trucks are behind.

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Coby7 · September 1, 2017

All of the above, manual specifies if you have a flat in the rear you must take a tire from the front and put it where the problem tire is at then put the spare in the front. Then it further goes on to not exceed 50mph or DIC errors will occur and urging drivers not to exceed 40mph to get to nearest service. I see this all too often on highways and don't understand people passing me on the highway on a donut. I guess people can't read.