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.

MAP sensor part numbers

Sensor	Part numbers	Linear	Offset	What to ask for	Notes
GM 2-bar Clip-in style	Delphi `09350899` GM `12580698` GM `12615136` Current GM `19418810`	`200.000`	`+8.000`	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.
GM 2-bar Remote brick style	Delphi/GM `12247571` GM `16009886` GM `16040609` GM `16254539` GM `12569241` ACDelco `213-1520`	`200.000`	`+8.000`	1991–1993 GMC Syclone and Typhoon 4.3L Turbo	Connects to the intake manifold with a vacuum or boost hose. Useful when the intake does not accept a direct-mount sensor.
GM 3-bar Gen IV / LS3 style	GM `12592525` Current GM `55567257` ACDelco `213-4760`	`312.500`	`-11.250`	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	Delphi/GM `12223861` GM `16040749` ACDelco `213-1562`	`314.4654`	`+1.1101`	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 a scanner that key-on/engine-off MAP agrees with actual atmospheric pressure—anywhere from about 100 kPa at sea level to the mid-80s kPa at high elevation, such as Denver.

Need the PCM calibrated for this sensor?

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

GM Mail-Order Tune HP Tuners RTD

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.

Gen III truck-style GM MAP sensor — **Gen III truck style:** Clip-in sensor with the pressure port near the center. Common on Gen III truck and SUV intake manifolds.

Gen III car-style GM MAP sensor — **Gen III car style:** Clip-in sensor with an offset pressure port. Common on LS1, LS2 and LS6-style car manifolds.

Gen IV LS3-style bolt-in GM MAP sensor — **Gen IV or LS3 style:** Seals with an O-ring and is held in place by a bolt. This is the style commonly used by LS3, LSA and many aftermarket manifolds.

Gen IV MAP sensor to Gen III wiring harness adapter — **Gen IV-to-Gen III adapter:** Connects a Gen IV-style MAP sensor to a Gen III engine harness. The PCM calibration must still be changed to match the sensor.

Remote-mounted GM brick-style MAP sensor — **Remote brick style:** Connects to manifold pressure through a hose. Useful when the intake manifold does not have the correct sensor opening.

Remote brick MAP sensor to Gen III wiring harness adapter — **Brick-sensor adapter:** Connects a remote GM brick-style MAP sensor to a Gen III harness.

Not sure which sensor fits your calibration?

Send the year, engine, PCM, intake manifold, and sensor part number. We will point you toward the correct calibration path before you order.

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