Anyone know how to change out the front airbag sensor on a 2004 chevy express 3500? It's located below the bracket under the radiator, but the screw comes down from the top. Do I have to take out the radiator to get to the screw? It's only one screw holding it on, but I can't figure out how to get to it. Thanks.

There is no relay.

1996 Chevrolet Truck G10 1/2 ton Van 5.0L SFI 8cyl

The MAP Sensor is located: Front seating area, center, under engine cover, rear passenger side of intake manifold, above valve cover, mounted on bracket.Here's a link to what it look's like Brad. MAP Sensor at AutoZone com Best MAP Sensor Parts for Cars Trucks SUVS

Not being too familiar with the Chevy venture apart from being in the vacinity of the radiator somewhere the only other option I would of thought is on the front part of a chassis rail where the bumper bolts to my reason being is that you would not want the airbags to deploy from a slow impact but a more fierce impact when damage could start to crush the front part of the chassis then the airbags would be deployed

you can change it yourself . purchase could be around 300$ and the front right airbag sensor is located under truck in front right side on crossmember radiator bottom.

if you have the 2.2 2.3 2.4 engines oil dip stick location on passenger side front engine down below upper radiator hose below the throttle body resonator.

if ur replacing it remove front grill disconnect both lines and carefully remove retaining clips from radiator if replacement is original eguipt mount & reconnect --if its a universal follow instructions usually cut off fittings and use clamps and hose to hook up

Pinpoint Test R: Diagnostic Trouble Code 44 — RH Radiator Primary Crash Front Air Bag Sensor Not Mounted to Vehicle Properly Normal Operation
NOTE: Circuit 618 (BL/W) is grounded to the side of the RH radiator primary crash front air bag sensor case, and the case is grounded through the bracket to the vehicle at its mounting point.
The air bag diagnostic monitor (14B056) measures the resistance between pin 20 (circuit 618 [BL/W]) and pin 3 (circuit 57M [BK]), the air bag diagnostic monitor reference ground. If the air bag diagnostic monitor measures a difference of more than 2.0 ohms between pin 20 and pin 3, it will flash diagnostic trouble code (DTC) 44.
Possible Causes
High resistance on pin 20 (circuit 618 [BL/W]) to ground can be caused by:

• A poor connection due to loose mounting, dirt, or corrosion at the RH radiator primary crash front air bag sensor bracket mounting location.
• An open or damaged wire in circuit 618 (BL/W) from pin 20 of the air bag diagnostic monitor connector to the RH radiator primary crash front air bag sensor connector.
• An open circuit inside the RH radiator primary crash front air bag sensor.

454 with ac and a.i.r.

you may not always have to replace sensors, but you will have to change the airbag module (usually under front seat, sometimes in middle of dash) To remove the passenger airbag you have to take out the dash.

Disconnect negative battery cable. If you have Delco Loc or Theftlock audio system, turn off feature which reqiers disconnecting the battery. Make sure engine is cool and turn cap slowly to release pressure. Drain cooling system. Disable airbag system by disconnecting the electrical connector from the airbag system's forward discriminating sensor located on the hood latch support bracket. Remove the cooling fan and shroud assembly. Next loosen clamps for upper and lower hoses then Disconect from radiator. Disconect the coolant reservoir inlet and outlet hoses from radiator. You will need a couple drain pans and rags. If your car has an automatic transaxle, Disconect it from the left side tank of the radiator. Use a back-up wrench on each welded nut while loosening the cooler fitting. Be careful not to bend or brake any lines when loosening the fittings. If they are tight spry some WD-40 and wait about 10 mins. Plug the ends of the disconected lines to prevent leakage. Remove right and left head lamp assembiles. Remove hood latch support brakets from radiator crossmember. Remove condenser mounting bolts. Remove the radiator upper mounting bolts located at the upper left and right ends of radiator's side tanks. Now carefully remove radiator. To install just follow directions backwards. I hope this helped.