Flashers don't work.
Changed flasher module but signals and flashers don't work

Recent updates to the exterior of the 2006 GMC Savana Cargo Van have made it a more modern, dressed up commercial hauler than its closest competitor, the Ford Econoline. It was also the first cargo van to offer all-wheel drive and an optional driver's side door in addition to the standard passenger door.
The 2006 Savana Cargo Van comes in half-ton (1500), three-quarter ton (2500) and one-ton (3500) models, with an extended, 20-inch longer wheelbase offered on the latter two. This means maximum cargo capacity on the 3500 reaches 317 cubic feet. This year, the 2006 Savana Cargo gets an optional 6.6-liter, 250-hp turbodiesel V8 that has 460 lb-ft of torque for the 2500 and 3500. This is in addition to the standard 4.3-liter, 195-hp V6 for th 1500, the 4.8-liter, 285-hp V8 on the 2500 and the 6.0-liter, 300-hp V8 with 360 lb-ft of torque. The AWD feature is offered only on the 1500 and comes with a 5.3-liter, 295-hp V8 with 330 lb-ft of torque.
Seating is for two, and interior features are minimal. This generation of the 2006 Savana Cargo features a stiffer suspension, stronger stabilizer bars, and improved brakes, along with Stabilitrak for better handling and 5-star crash ratings, though some drivers say the maneuverability and ride can be erratic, especially when loaded. When the 3500 is loaded with the 6.0 V8, it can tow up to 10,000 pounds. Drivers like this hauling capacity, and the exterior styling also gets praised. Interior materials are disappointingly cheap-looking.
Changed flasher module but signals and flashers don't work
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Airbags
Front passenger airbag delete · Dual front airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel · Front brakes: ventilated disc · Rear brakes: ventilated disc
Convenience Features
Center console: front console with storage · Cupholders: front · Steering wheel: tilt-only · Storage: door pockets
Driver Seat
Manual adjustments: 8
Drivetrain
Locking differential: rear
Exterior Features
Bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side hinged swing-out
Headrests
Front headrests: adjustable
Locks
Power door locks: remote
Mirrors
Exterior mirrors: power · Inside rearview mirror: electrochromic
Roof
OEM roof height: undefined
Seats
Front seat type: bucket · Upholstery: cloth
Spare Tire
Mount Location: underbody
Suspension
Front Suspension Classification: independent · Rear Suspension Classification: solid live axle · Rear Suspension Type: short and long arm · Stabilizer bar(s): front
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: steel
Windows
Front wipers: intermittent
Airbags
Front passenger airbag delete · Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel · Front brakes: ventilated disc · Rear brakes: ventilated disc
Convenience Features
Center console: front console with storage · Cupholders: front · Steering wheel: tilt-only · Storage: door pockets
Driver Seat
Manual adjustments: 8
Drivetrain
Locking differential: rear
Engine
Oil cooler: auxiliary
Exterior Features
Bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side manual sliding
Headrests
Front headrests: adjustable
Locks
Power door locks: remote
Mirrors
Exterior mirrors: manual · Inside rearview mirror: electrochromic
Roof
OEM roof height: undefined
Seats
Front seat type: bucket · Upholstery: vinyl
Spare Tire
Mount Location: underbody
Suspension
Front Suspension Classification: independent · Rear Suspension Classification: solid live axle · Rear Suspension Type: short and long arm · Stabilizer bar(s): front
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: steel
Windows
Front wipers: intermittent
Airbags
Front passenger airbag delete · Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel · Front brakes: ventilated disc · Rear brakes: ventilated disc
Convenience Features
Center console: front console with storage · Cupholders: front · Steering wheel: tilt-only · Storage: door pockets
Driver Seat
Manual adjustments: 8
Drivetrain
Locking differential: rear
Engine
Oil cooler: auxiliary
Exterior Features
Bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side manual sliding
Headrests
Front headrests: adjustable
Locks
Power door locks: remote
Mirrors
Exterior mirrors: manual · Inside rearview mirror: electrochromic
Roof
OEM roof height: undefined
Seats
Front seat type: bucket · Upholstery: vinyl
Spare Tire
Mount Location: underbody
Suspension
Front Suspension Classification: independent · Rear Suspension Classification: solid live axle · Rear Suspension Type: short and long arm · Stabilizer bar(s): front
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: steel
Windows
Front wipers: intermittent
Airbags
Front passenger airbag delete · Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel · Front brakes: ventilated disc · Rear brakes: ventilated disc
Convenience Features
Center console: front console with storage · Cupholders: front · Steering wheel: tilt-only · Storage: door pockets
Driver Seat
Manual adjustments: 8
Drivetrain
Locking differential: rear
Engine
Oil cooler: auxiliary
Exterior Features
Bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side manual sliding
Headrests
Front headrests: adjustable
Locks
Power door locks: remote
Mirrors
Exterior mirrors: integrated turn signals · Inside rearview mirror: electrochromic
Roof
OEM roof height: undefined
Seats
Front seat type: bucket · Upholstery: cloth
Spare Tire
Mount Location: underbody
Suspension
Front Suspension Classification: independent · Rear Suspension Classification: solid live axle · Rear Suspension Type: short and long arm · Stabilizer bar(s): front
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: steel
Windows
Front wipers: intermittent
Airbags
Front passenger airbag delete · Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel · Front brakes: ventilated disc · Rear brakes: ventilated disc
Convenience Features
Center console: front console with storage · Cupholders: front · Steering wheel: tilt-only · Storage: door pockets
Driver Seat
Manual adjustments: 8
Drivetrain
Locking differential: rear
Engine
Oil cooler: auxiliary
Exterior Features
Bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side hinged swing-out
Headrests
Front headrests: adjustable
Locks
Power door locks: remote
Mirrors
Exterior mirrors: heated · Inside rearview mirror: electrochromic
Roof
OEM roof height: undefined
Seats
Front seat type: bucket · Upholstery: vinyl
Spare Tire
Mount Location: underbody
Suspension
Front Suspension Classification: independent · Rear Suspension Classification: solid live axle · Rear Suspension Type: short and long arm · Stabilizer bar(s): front
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: steel
Windows
Front wipers: intermittent
Airbags
Front passenger airbag delete · Dual front airbags
Audio System
Single disc in-Dash CD · AM/FM radio
Brakes
ABS: 4-wheel · Front brakes: ventilated disc · Rear brakes: ventilated disc
Convenience Features
Center console: front console with storage · Cupholders: front · Steering wheel: tilt-only · Storage: door pockets
Driver Seat
Manual adjustments: 8
Drivetrain
4WD Type: full time · Limited slip differential: center · Locking differential: rear
Exterior Features
Bumper color: chrome · Rear trunk/liftgate: barn · Side door type: passenger-side hinged swing-out
Headrests
Front headrests: adjustable
Locks
Power door locks: remote
Mirrors
Exterior mirrors: heated · Inside rearview mirror: electrochromic
Roof
OEM roof height: undefined
Seats
Front seat type: bucket · Upholstery: vinyl
Spare Tire
Mount Location: underbody
Suspension
Front Suspension Classification: independent · Rear Suspension Classification: solid live axle · Rear Suspension Type: short and long arm · Stabilizer bar(s): front
Tires
Type: all season
Tires and Rims
Spare tire size: full-size matching · Wheels: steel
Windows
Front wipers: intermittent