GM MAP SENSOR GUIDE

GM 2-Bar and 3-Bar MAP Sensors

Common factory GM sensors for boosted LS and other GM tuning applications. Buy by the exact part number whenever possible. Parts-store catalogs often list several different pressure sensors for the same vehicle.

Sensor	Part numbers	What to ask for	Notes
GM 2-bar Clip-in style	GM `12580698` GM `12615136` Current GM `19418810`	2005–2007 Chevrolet Cobalt SS Supercharged 2.0L 2004–2007 Saturn Ion Red Line 2.0L	Commonly used on boosted Gen III LS combinations. Technically, for a Cobalt, this is the barometric pressure sensor. Asking for a Cobalt MAP sensor may not get you the right sensor. This is also used in the Duramax, XLR-V, and STS-V
GM 2-bar Remote brick style	GM `16009886` GM `16040609` GM `16254539` GM `12569241` ACDelco `213-1520`	1991 GMC Syclone 1992–1993 GMC Typhoon	Connects to the intake manifold with a vacuum or boost hose. Useful when the intake does not accept a direct-mount sensor. This is also found in the Grand National, and 6.5 Detroit Diesel Trucks from the 80s and 90s.
GM 3-bar Gen IV / LS3 style	GM `12592525` Current GM `55567257` ACDelco `213-4760`	2012–2015 Camaro ZL1 2009–2015 Cadillac CTS-V 2009–2013 Corvette ZR1	Factory LSA and LS9 sensor. This is the common bolt-in 3-bar choice for Gen IV and LS3-style intake manifolds.
GM 3-bar Remote brick style	GM `16040749` GM `12223861` ACDelco `213-1562`	Order by part number	Old GM/Delphi remote-mount 3-bar sensor. Vehicle catalog listings are inconsistent, so ordering by part number is safer.

After Installation verify with scanner that key-on/engine-off MAP agrees with actual atmospheric pressure (anywhere from 100 kPa at lea level to mid 80s kPa at high elevation like Denver).

Need a tune? PCM Tuners can configure the correct MAP sensor calibration and tune the vehicle remotely or by mail.

GM Mail-Order Tune
HP Tuners RTD
GM VATS Delete

MAP Sensor Styles and Manifold Fitment

Many aftermarket sheet-metal LS intake manifolds and later Gen IV/TBSS-style cathedral-port manifolds are designed for the Gen IV or LS3-style bolt-in MAP sensor.

If you install one of these manifolds on a Gen III engine harness and PCM, you will normally need a connector adapter, or repinned connector. The Gen III PCM must also be calibrated for the Gen IV MAP sensor being used. Changing the connector does not correct the sensor scaling in the PCM.

Some people install a Gen III clip-in sensor in the larger opening and seal it with RTV. It may work, but it is ugly and should not be considered a good long-term solution. The proper bolt-in sensor and connector are much cleaner and less likely to leak or come loose.