GM Chevy Chevrolet Buick Gear Shift to Park Error Fix Repair Micro Switch Transmission

GM models automatic transmission gear shifter intermittently are not shifting into gear when depressing the brake or when it is not shift out of park. When micro switch is worn out, it causes intermittently bad connection to the shift control circuit that is affecting the shift inter locking function.  GM dealership wants over $750 for the repair!

[ PLEASE MAKE SURE THAT YOUR PART LOOKS EXACTLY THE SAME AS LISTED HERE ]

Our solution is replacing only one micro switch "Repair Kit" instead of buying an expensive complete assembly from the dealer, or you could get a used part eventually having the same problem.

GENUINE GM Smallest sealed snap-action switch in the industry with a very long stroke for reliable ON/OFF action. This Is Genuine Made in JAPAN NOT Aftermarket Chinese Replacement Item.

It’s an issue with a microswitch, to remedy the issue you can replace the microswitch now (some dealerships replace the whole assembly for $1K). While the shifter problem won’t stop you from driving the automobile, it will probably block you from shutting it down. Therefore, do not delay the repair. You never know when you might be stranded inside the vehicle, without a safe way to turn it off, lock and leave.

The primary cause is that corrosion or other material builds up on the park switch contacts. It prevents the Body Control Module (BCM) from electronically sensing that the vehicle is in the park position. Thus, the BCM prevents the ignition from turning off. It keeps happening until and unless you fix the shift to park message.

Sometimes, wiggling the shifter lever and changing the transmission positions a few times works. However, this is only a temporary solution.

Park indicator not working? The switch that activates it wears with repeated use, causing battery drain when the cluster fails to go into its sleep mode. This GENUINE GM microswitch replaces the original without changing the shifter assembly.

·         Cost-effective solution - this microswitch replaces the worn-out original without having to replace the shifter assembly

·         Prevents damage - delaying this replacement will cause the instrument cluster to remain on at all times and weaken the battery

·         Easy installation - requires splicing into original harness with included connectors

·         Quality engineering - designed in the Japan and backed by decades of automotive aftermarket experience

  

·    Condition: 100% new OEM Made in JAPAN

·    Material: Plastic & Metal

·    MPN: D2HW-BL251HGM / D3HW-BL221GM

·    Item included: 1 x GENUINE touch micro switch (google for instructions  how to replace the switch)

GM Part Number	D2HW-BL221GM / D3HW-BL221GM
Manufacturer	Omron Japan Electronics
Manufacturer Product Number	D2HW-BL221GM / D3HW-BL221GM
Description	SWITCH SNAP ACT SPDT 100MA 125V
Detailed Description	Switch SPDT Chassis Mount

P1780 Opel Park/Neutral Position Switch Malfunction

Possible causes
– Faulty Park/Neutral Position (PNP) switch
– Park/Neutral Position (PNP) switch harness is open or shorted
– Park/Neutral Position (PNP) switch circuit poor electrical connection
– Misadjusted Park/Neutral Position (PNP) switch
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1780 Opel Description
The Park/Neutral Position (PNP) switch detects the shift lever position and sends signals to the ECM. The ECM receives signals (NSW, R, 2, and L) from the park/neutral position switch. When the signal is not sent to the ECM from the park/neutral position switch, the ECM judges that the shift lever is in the D position.