Gmc jimmy heated seat not working on one side only.

Power Seats System Description and Operation
Power Seat System Operation
There are 2 options of power seat systems available in full size trucks. The 6 way driver and passenger power seats, and 8 way driver and passenger power seats with driver memory. For the driver memory seat operation refer to Memory Seats Description and Operation . Power seats without memory are completely controlled through the power seat switch. Battery voltage is supplied to the power seat switch through the power seat circuit breaker. While the seat adjuster switches are in an inactive state the switch contacts are closed to the power seat switch ground circuit. When a power seat switch is pressed to an active state the switch contact is closed to the battery voltage supply circuit. Each seat adjuster motor is controlled by the power seat switch through 2 motor control circuits. The seat adjuster motors are bidirectional and the direction of adjuster motor rotation is determined by which of the adjuster motor control circuits is switched to battery voltage while the other remains grounded.


( I'm not good at wiring an running an ohm meter.) well then you need to take it to a qualified repair shop.

Not a fuse problem , more likely a burnt out element .
CHEVY GMC SEAT HEATER TROUBLESHOOTING YouTube

Your best bet , take it to a qualified repair shop.

The heated seat system consists of the following components:
• Driver and passenger heated seat switches
• Driver and passenger seat back heater elements
• Driver and passenger seat cushion heater elements
• Driver and passenger seat back temperature sensors
• Driver seat module
• Driver door module
• Passenger door module

Do you know what a electronic module is ?
DTC B2425 or B2430
Circuit Description
The driver and passenger seat heaters are controlled by the driver seat module. Power is supplied to the driver seat cushion and back heater elements through individual voltage supply circuits. Power is supplied to the passenger seat cushion and back heater elements through a common voltage supply circuit. All of the driver and passenger seat heater elements are grounded by the driver seat module through individual low side drive control circuits. The heater element control circuits are pulse width modulated to ground by the driver seat module in order to control the seat temperatures by regulating the current flow through the heater elements.
DTC Descriptors
This diagnostic procedure supports the following DTCs:
• DTC B2425 Driver Seat Heater Circuit
• DTC B2430 Passenger Seat Heater Circuit

Do you know what a DTC - diagnostic trouble code is.

Heated Seat Components
The heated seat system consists of the following components:
• Driver and passenger heated seat switches
• Driver and passenger seat back heater elements
• Driver and passenger seat cushion heater elements
• Driver and passenger seat back temperature sensors
• Driver seat module
• Driver door module
• Passenger door module
When there are modules involved in the operation of any componet that's acting up , the module's electronic's could be the culprit ! But without testing who's to say what the problem could be !
I would have it check for DTC'S
DTC B2425 or B2430
The driver and passenger seat heaters are controlled by the driver seat module. Power is supplied to the driver seat cushion and back heater elements through individual voltage supply circuits. Power is supplied to the passenger seat cushion and back heater elements through a common voltage supply circuit. All of the driver and passenger seat heater elements are grounded by the driver seat module through individual low side drive control circuits. The heater element control circuits are pulse width modulated to ground by the driver seat module in order to control the seat temperatures by regulating the current flow through the heater elements.
DTC B2435 or B2440
The driver seat module relies on inputs from thermistors installed in the driver and passenger seat backs to control heated seat temperatures. The thermistors are 2-wire sensors supplied with a 5-volt referenced signal circuit and low reference circuit from the driver seat module. Resistance through the thermistors varies with temperature causing the heated seat sensor signal circuit voltage levels to decrease as the seat back temperatures rise.
Install a scan tool.
Start the engine.
Turn the heated seat ON.
With a scan tool, observe the Heated Seat Sensor parameter in the data list for the driver seat module.
Does the scan tool indicate that the heated seat sensor parameter is within the specified range?
0.078-4.94 V

Auto Repair: How to Replace a Power Seat Motor - YouTube

? 1:44
https://www.youtube.com/watch?v=EDh-0rs5Fjo
Oct 26, 2010 - Uploaded by automdvideos
Auto Repair: How to Replace a Power Seat Motor ... 2007 - 2008 Ford Expedition/Lincoln Navigator Driver Bottom Install Video ...2003-2006 Chevy/GMC Seat Cover Install 1 of 3 - eBay Ready ...2000 Ford Explorer Front Seat Track Stuck Motor Repair - Duration: 4:39. by cubmancan 4,959 views. 4:39.
Drivers seat is dead! No power seat or heat. - TheDieselGarage.comwww.thedieselgarage.com/.../96465-drivers-seat-dead-no-power-seat-hea...Mar 22, 2010 - 2003-2005 Chevrolet Avalanche, Silverado, Suburban, Tahoe 2003-2005.... Power seat on driver side didn't work.....passenger did! Neither ...DANG electric seat ' Chevy Truck Forum ' GM Truck Clubwww.gmtruckclub.com/forum/threads/dang-electric-seat.2990/Apr 27, 2006 - 10 posts - ‎7 authors'03 Tahoe My driver seat just stopped, of corse not where I need it, the ... I have a 2003Tahoe and both heated seats are not working. ... with my seat heater on the drivers seat in my 03 Avalanche, it turns ... The driver's side on my Silverado gets way warmer than the passenger side. ... Frozen New Member.Power Seat Problems?? - Tahoe Forum - Che

The next time the seat is inoperable pull the switch out and test it for a voltage signal that should be present when the button in question is operated. The switch is the most common issue that I have seen, but hold on replacing it until the switch is tested.

reconnect and the connect back the cabel joint under ther the driver seat

I have the same problem except the back of mine works but the bottom doesn't. Passenger side is fine. Let me know what you find out if you could.

Check wiring under the seat. Frequent habit of pushing things under the seat such as flashlights and tools etc and moving the seat forward and back sometimes pulls wires or breaks them.

Before you start beating up thing's , test the electrical circuits. Do you know anything about automotive electrical systems ? How to use a volt meter an a wiring diagram to test for B+ power to the switch an testing the ground .
Does your envoy have memory seats ? Your vehicle has four or more electric motors to control back an foward , up an down etc.. the odds of more then one motor being bad at one time are highly unlikely .
Look under the seat any trash under there keeping it from moving ?
If you have memory seats there is a control module involved in making the seats work . If it has memory seats it could have DTC'S - diagnostic trouble codes .
DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820
The seat adjuster switches are inputs to the driver and passenger seat modules. The seat modules supply the adjuster switch assemblies with a battery positive switch supply circuit and monitor the switch signal circuits. In an inactive state the switch signal circuits are floating and when a switch is pressed the signal circuit is closed to the switch power circuit within the adjuster switch assembly. When battery voltage is present on the switch signal circuit the seat module determines the switch status to be active.
DIY Blazer GMC Jimmy Power Seat Control Diagnostics and Repair Electric...

both my power seats are not working at all ..it first started with driver seat , to make seat move forward and back tilting the recliner was working then it went out ..not working either..then after a month later my pasenger seat stopped working as well... what might be the issue..please reply