Question about 1997 Chevrolet Suburban

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Suburban is showing Code p1875

Suburban seems to be stuck in 4 wheel drive low. Engine is running at a higher RPM.

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: 4 wheel drive wont swich back to 2 wheel drive

For a temporary fix so the car can drive, remove the fuse for the four wheel drive. it won't actuate the four wheel. The car is always in 2wheel drive. the fuse is located under the hood, the very right side of the of the fuse box, the third fuse up from the bottom. This can be checked in the owners manual. When I need four wheel dr I place the fuse back in. I haven't fixed the problem yet but can drive it 2wheel on the road. think it is the control module for the four wheel dr located under the dash board behind the glove box. Dealer part for $450, I would rather install and remove a 10cent fuse

Posted on Jul 29, 2008

sledge1863
  • 149 Answers

SOURCE: engine wont go over 3000 rpm while driving

Is the check engine light on? If so check what codes are stored. It sounds like the m a p sensor.
Good luck dont forget to rate.

Posted on Mar 08, 2009

  • 2 Answers

SOURCE: My 98 s10 is stuck in 4 wheel drive low.

Pull the kick panel on the passenger side. there is a small box mounted there that is the computer that controls the actuator for the 4wd system. this is notorious for problems due in fact that the connector likes to pull out and away from the module. I had the same problem and the solution is simple.. take a long zip tie and get it between a few of the wires and around the module. tie it in and have a nice day.. it wont come off or try to pop out anymore and you should have no issues getting into 2wd, 4wd h, 4wd L.


Posted on Jun 21, 2009

GM Elec
  • 1000 Answers

SOURCE: My 2003 Suburban is stuck in 4 wheel low

It sounds as if it is a module eprom issue. When the key was turned on the program was scrambled.Try disconnecting the negative and positive battery cables. Once both are disconnected from the battery, touch the two cables together for 1 minute, this will drain the reserve energy in the module. This process will reset the modules to factory default.
Reconnect the battery, positive first then the negative.

Posted on Jul 20, 2009

  • 7 Answers

SOURCE: Chevrolet Suburban 4 Wheel Drive Indicator Lights

Just serviced my own 4x4 Suburban, by buying a 2nd hand encoder motor and replaced the old one, which was trashed by the winter salt. The device is prone to failure since it's made of alluminium and water has an easy time of entering the unit and trashing it.

CAUTION: Abbreviated gratuitous information of how an encoder motor was serviced. If unqualified to deal with repair, seek professional service.
CAUTION: Read at one's own risk.

To replace it, you need to crawl under the vehicle and remove the front drive shaft;

Disconnect the electric harness to the encoder motor, followed by unbolting it.

Take replacement encoder motor and install. There may be an issue with aligning the cogged cam of the transfer case to the encoder motor. If so, the vehicle's 4 wheels will need to be raised off the ground. The engine started, transmission in Park, and using a Vice-Grip® wrench gently rotate cam clockwise approximately 1/16 to 1/8 of an inch, then while set in this position, stop engine. Now attempt to align and attach the encoder motor.

After successfully attaching new encoder motor, attach its wiring loom.
Test vehicle.


Posted on Sep 01, 2009

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1 Answer

Almost unable to turn steering wheel.Heat smell coming from around Alternator belt but belt runnig fine and tension good. When turning wheel after 5 minutes engine running the ESP ABS and Alternator lights...


engine RPM must be near 800 not 400.
for all accessories to work , alternator, and P/S and A/C

so RPM is first.
next is belts must not slip.

the engine is running too slow. that is called bad idle controls
the PCM controls idle at all times perfectly
so its lost control and that is causes by 50 reasons.
get it serviced, is what you do.
or learn to fix cars. if you didnt notice low RPM then you need to learn that first.,

low rpm can be cause by
1: never getting a tuneup ever?
2: bad spark. weak or worse dead plugs.
3: bad fuelling, (too lean, or to rich misfiring)
4:bad engine, (50 reason) but can be vacuum leaks or ISC valve stuck closed, or EGR valve stuck open.

next time ALT lamp comes on , use your right foot to raise rpm to 800 or more, id bet the alt light goes out, and the P./S pump wakes up.

Mar 13, 2015 | 2006 Suzuki Swift

1 Answer

Vibrations during idling


which engine.??? never post lacking engine ,here is why.
1.3 L G13B I4
1.5 L G15A I4
1.6 L G16B I4
1.8 L J18A I4
1.8 L BP-ZE I4
1.9 L XUD9 diesel I4

Ill answer in the generic and for GAS engines. only.
that is illegal RPM, the ECU regulates it to 800 all the time
that means the ECU can not regulate the RPM now, for many reasons.
and sure it vibrates too low, that is normal for all 4cylinders to do that.
no bad engine mounts never lower RPM to 600, ever.
they dont control idle speed at all.
the #1 reason for most cars to idle too low are:
1: EGR leaks, (clean it)
2: ISC stuck closed (electric idle speed acututor dirty) clean it.
3: gross misfiring , caused by bad spark or bad fuel mix.
4: low compression on 1 or more cylinders (real low) Do compression test at WOT. throttle.



Apr 19, 2014 | 1997 Suzuki Baleno

1 Answer

1996 chevy s10 code read a P1875. what is it and how to fix it?


In Chevrolet vehicles, code P1875 is given the description "4WD Low Switch Circuit Electrical." A fault has been sensed in the electrical switch circuit for the low setting of the four-wheel drive when this code appears. The problem sensed is within an electrical circuit that connects the Vehicle Control Module to the Transfer Case Control Module. good-day !

Jan 08, 2012 | Chevrolet Blazer Cars & Trucks

3 Answers

Code po650, po332,p1875 comes on what do they mean exactly,whats wrong


CODE PO650 MALFUNCTION INDICATOR LAMP CIRCUIT MALFUNCTION CONDITIONS. POSSIBLE CAUSES MIL CONTROL CIRCUIT IS OPEN , SHORTED TO GROUND TO SYSTEM POWER,MIL CONTROL POWER CIRCUIT OPEN IN THE INSTRUMENT CLUSTER, MIL THE LAMP IS DAMAGED OR HAS FAILED,INSTRUMENT CLUSTER OR THE PCM HAS FAILED. CODE PO332 KNOCK SENSOR CIRCUIT LOW INPUT BANK 2 CONDITIONS, POSSIBLE CAUSE KNOCK SENSOR FAILED, CODE P1875 4WD LOW SWITCH CIRCUIT MALFUNCTION CONDITIONS FOR TRANSMISSIONS 4L60E 4L80E, POSSIBLE CAUSES 4WD SWITCH LOW SIGNAL CIRCUIT IS OPEN OR SHORTED TO GROUND, 4WD LOW SWITCH IS DAMAGED OR IT HAS FAILED,PCM HAS FAILED.

Mar 14, 2011 | 2003 Chevrolet Avalanche

1 Answer

My 2003 suburban seems to run at a higher rpm.


Hummm, 2000 rpm does not seem high, really. But another item to look at is your FAN. The clutch fan fails and drives the fan full engauge. Sounds like a jeep...massive sounding, relating to engine RPM, but not necessarily different.

I mentiont his because a trans does not typically fail and give a few hundred RPM. Usually a slipping sensation is described....

Jul 12, 2010 | 2003 Chevrolet Suburban 1500

1 Answer

4 Wheel drive not functional


There is a TSB on this problem: TSB #03-04-21-001C

Subject:4WD Switch Indicator Lights Flashing, 4WD Inoperative, DTCs C0327, P0500, P0836, P1875 Set (Replace Encoder Motor Sensor, Reprogram TCCM, Inspect Front Drive Axle Engagement Sleeve for Damage/Repair) #03-04-21-001D - (12/04/2003)



Models:2003 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2003 GMC Sierra, Yukon, Yukon XL
with 4WD and Electric Shift or Active Transfer Case (RPO NP1 or NP8)
You can also try removing the TREC fuse (engine fuse box) and reinstall after 30 seconds. Look up the TSB number I gave you and you'll find alot more information.

Dec 16, 2009 | 2003 Chevrolet Tahoe

1 Answer

2001 ford ranger stuck in low range


SOUNDS LIKE THE LOCK UP SWITCH TO THE TORQUE CONVERTER IS MALFUNTIONING
GIVING A FALSE SINGLE TO THE TRANS. GEAR RATIO TO SLIP IN AND OUT OF 4 WHEEL DRIVE

Mar 25, 2009 | 1994 Ford Ranger Supercab

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