Petsafe GRP-3IN1 Fitting & Use Manual Download Page 2

Open all 3 quick-release 
buckles, and then fit the 
shoulder strap around your 
dog’s shoulders. The gray 
seat belt handle should lie 
flat in between the dog’s 
shoulder blades.

Bring the center strap between 
the dog’s front legs, and adjust 
the girth straps for a comfortable 
snug fit. 

When fit properly, two fingers 
should barely fit between the fur 
and nylon strap. This prevents 
movement and chafing. 

Adjust the center chest 
strap to a comfortable 
length. When fit properly, 
the center strap should be 
snug and should not hang 
down off the dog’s chest.

1

Open the Girth and Shoulder Straps

2

Adjust the Shoulder Straps

3

Adjust the Girth Straps

4

Adjust the Center Chest Strap

5

Check for Proper Fit

3in1 Harness

 

Fitting Step-by-step

Important:

 Throughout the fitting process and during initial use of 3in1 Harness,  

motivate and encourage your dog with praise and treats. If your dog is especially  
active, have someone help you by feeding treats while you fit and adjust. Remove 
the harness to make fitting adjustments. Fit your dog in a quiet, indoor space to 

ensure a stress-free and safe environment. Start with all straps fully extended. To 
achieve a proper fit, your dog should be standing. Dogs may “tense up” during  
fitting, so check the fit again after the dog has walked in the harness for a few  
minutes. Readjust as needed.

Adjust the shoulder straps so that 
the front O-ring is on or above 
the breast bone. This portion 
of the fitting is key—proper 
placement of the O-ring is 
essential for your dog’s comfort, 
as well as the effectiveness of 
the no-pull function.

Seat Belt Handle

(Gray Nylon)

D-Ring for 

Back Leash 

Attachment

Girth Straps 

with Quick-  

Release Buckle

Shoulder 

Straps

Center Chest Strap 

with D-Ring for Front 

Leash Attachment 

(Gray Nylon)

Front O-ring

Press your fingers on 
the lower front of the 
dog’s chest to locate 
the breast bone. 

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